CVE-2024-50301
Estado: ModificadaAlta (7.1)—
In the Linux kernel, the following vulnerability has been resolved:
security/keys: fix slab-out-of-bounds in key_task_permission
This issue was also reported by syzbot.
It can be reproduced by following these steps(more details [1]): 1. Obtain more than 32 inputs that have similar hashes, which ends with the pattern '0xxxxxxxe6'. 2. Reboot and add the keys obtained in step 1.
To fix this issue, one should jump to descend_to_node if the ptr is a shortcut, regardless of whether the node is root or not.
[1] https://lore.kernel.org/linux-kernel/1cfa878e-8c7b-4570-8606-21daf5e13ce7@huaweicloud.com/
[jarkko: tweaked the commit message a bit to have an appropriate closes tag.]
Detalles técnicos trazas, registros y código del informe original
KASAN reports an out of bounds read:
BUG: KASAN: slab-out-of-bounds in __kuid_val include/linux/uidgid.h:36
BUG: KASAN: slab-out-of-bounds in uid_eq include/linux/uidgid.h:63 [inline]
BUG: KASAN: slab-out-of-bounds in key_task_permission+0x394/0x410
security/keys/permission.c:54
Read of size 4 at addr ffff88813c3ab618 by task stress-ng/4362
CPU: 2 PID: 4362 Comm: stress-ng Not tainted 5.10.0-14930-gafbffd6c3ede #15
Call Trace:
__dump_stack lib/dump_stack.c:82 [inline]
dump_stack+0x107/0x167 lib/dump_stack.c:123
print_address_description.constprop.0+0x19/0x170 mm/kasan/report.c:400
__kasan_report.cold+0x6c/0x84 mm/kasan/report.c:560
kasan_report+0x3a/0x50 mm/kasan/report.c:585
__kuid_val include/linux/uidgid.h:36 [inline]
uid_eq include/linux/uidgid.h:63 [inline]
key_task_permission+0x394/0x410 security/keys/permission.c:54
search_nested_keyrings+0x90e/0xe90 security/keys/keyring.c:793
The reproducer demonstrates how this issue happened:
1. In the search_nested_keyrings function, when it iterates through the
slots in a node(below tag ascend_to_node), if the slot pointer is meta
and node->back_pointer != NULL(it means a root), it will proceed to
descend_to_node. However, there is an exception. If node is the root,
and one of the slots points to a shortcut, it will be treated as a
keyring.
2. Whether the ptr is keyring decided by keyring_ptr_is_keyring function.
However, KEYRING_PTR_SUBTYPE is 0x2UL, the same as
ASSOC_ARRAY_PTR_SUBTYPE_MASK.
3. When 32 keys with the similar hashes are added to the tree, the ROOT
has keys with hashes that are not similar (e.g. slot 0) and it splits
NODE A without using a shortcut. When NODE A is filled with keys that
all hashes are xxe6, the keys are similar, NODE A will split with a
shortcut. Finally, it forms the tree as shown below, where slot 6 points
to a shortcut.
NODE A
+------>+---+
ROOT | | 0 | xxe6
+---+ | +---+
xxxx | 0 | shortcut : : xxe6
+---+ | +---+
xxe6 : : | | | xxe6
+---+ | +---+
| 6 |---+ : : xxe6
+---+ +---+
xxe6 : : | f | xxe6
+---+ +---+
xxe6 | f |
+---+
4. As mentioned above, If a slot(slot 6) of the root points to a shortcut,
it may be mistakenly transferred to a key*, leading to a read
out-of-bounds read.CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Puntuación base: 7.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.28%
- Percentil entre todas las CVEs puntuadas: 19
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto principal
T1005Data from Local Systemcollection75 % - Impacto secundario
T1499.004Application or System Exploitationimpact65 %
CVE local (AV:L/PR:L) con lectura out-of-bounds en kernel (CWE-125), escalable a DoS o información local. Vector CVSS requiere acceso local sin UI, típico de T1068. Impacto primario: lectura de memoria no autorizada (T1005); secundario: negación de servicio por crash (T1499.004).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-125
- CWE-125
Referencias
- https://git.kernel.org/stable/c/199c20fb7499c79557a075dc24e9a7dae7d9f1ce
- https://git.kernel.org/stable/c/1e4332581cd4eed75aea77af6f66cdcdda8b49b9
- https://git.kernel.org/stable/c/3e79ad156bedf2da0ab909a118d2cec6c9c22b79
- https://git.kernel.org/stable/c/4a74da044ec9ec8679e6beccc4306b936b62873f
- https://git.kernel.org/stable/c/4efb69a0e294ef201bcdf7ce3d6202cd0a545a5d
- https://git.kernel.org/stable/c/bbad2d5b6c99db468d8f88b6ba6a56ed409b4881
- https://git.kernel.org/stable/c/c3ce634ad953ce48c75c39bdfd8b711dd95f346f
- https://git.kernel.org/stable/c/e0a317ad68e4ea48a0158187238c5407e4fdec8b
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
JSON original (NVD)
Mostrar
{
"id": "CVE-2024-50301",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-50301",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2025-10-01T20:13:51.070925Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.8,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.8
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.1,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.2,
"exploitabilityScore": 1.8
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.1,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.2,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "c3ce634ad953ce48c75c39bdfd8b711dd95f346f",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "4efb69a0e294ef201bcdf7ce3d6202cd0a545a5d",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "1e4332581cd4eed75aea77af6f66cdcdda8b49b9",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "199c20fb7499c79557a075dc24e9a7dae7d9f1ce",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "bbad2d5b6c99db468d8f88b6ba6a56ed409b4881",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "3e79ad156bedf2da0ab909a118d2cec6c9c22b79",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "e0a317ad68e4ea48a0158187238c5407e4fdec8b",
"versionType": "git"
},
{
"status": "affected",
"version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
"lessThan": "4a74da044ec9ec8679e6beccc4306b936b62873f",
"versionType": "git"
}
],
"programFiles": [
"security/keys/keyring.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.324",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.286",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.230",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.172",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.117",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.61",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.11.8",
"versionType": "semver",
"lessThanOrEqual": "6.11.*"
},
{
"status": "unaffected",
"version": "6.12",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"security/keys/keyring.c"
],
"defaultStatus": "affected"
}
]
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"affectedData": [
{
"vendor": "Siemens",
"product": "RUGGEDCOM RST2428P",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "V3.2",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "V3.2",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SCALANCE XCM-/XRM-/XCH-/XRH-300 family",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "V3.2",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "*",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"versions": [
{
"status": "affected",
"version": "V3.1.0",
"lessThan": "V3.1.5",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"versions": [
{
"status": "affected",
"version": "V3.1.0",
"lessThan": "V3.1.5",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"versions": [
{
"status": "affected",
"version": "V3.1.0",
"lessThan": "V3.1.5",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"versions": [
{
"status": "affected",
"version": "V3.1.0",
"lessThan": "V3.1.5",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"vendor": "Siemens",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"versions": [
{
"status": "affected",
"version": "V3.1.0",
"lessThan": "V3.1.5",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]
}
],
"published": "2024-11-19T02:16:32.230",
"references": [
{
"url": "https://git.kernel.org/stable/c/199c20fb7499c79557a075dc24e9a7dae7d9f1ce",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/1e4332581cd4eed75aea77af6f66cdcdda8b49b9",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3e79ad156bedf2da0ab909a118d2cec6c9c22b79",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4a74da044ec9ec8679e6beccc4306b936b62873f",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4efb69a0e294ef201bcdf7ce3d6202cd0a545a5d",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bbad2d5b6c99db468d8f88b6ba6a56ed409b4881",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c3ce634ad953ce48c75c39bdfd8b711dd95f346f",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e0a317ad68e4ea48a0158187238c5407e4fdec8b",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsecurity/keys: fix slab-out-of-bounds in key_task_permission\n\nKASAN reports an out of bounds read:\nBUG: KASAN: slab-out-of-bounds in __kuid_val include/linux/uidgid.h:36\nBUG: KASAN: slab-out-of-bounds in uid_eq include/linux/uidgid.h:63 [inline]\nBUG: KASAN: slab-out-of-bounds in key_task_permission+0x394/0x410\nsecurity/keys/permission.c:54\nRead of size 4 at addr ffff88813c3ab618 by task stress-ng/4362\n\nCPU: 2 PID: 4362 Comm: stress-ng Not tainted 5.10.0-14930-gafbffd6c3ede #15\nCall Trace:\n __dump_stack lib/dump_stack.c:82 [inline]\n dump_stack+0x107/0x167 lib/dump_stack.c:123\n print_address_description.constprop.0+0x19/0x170 mm/kasan/report.c:400\n __kasan_report.cold+0x6c/0x84 mm/kasan/report.c:560\n kasan_report+0x3a/0x50 mm/kasan/report.c:585\n __kuid_val include/linux/uidgid.h:36 [inline]\n uid_eq include/linux/uidgid.h:63 [inline]\n key_task_permission+0x394/0x410 security/keys/permission.c:54\n search_nested_keyrings+0x90e/0xe90 security/keys/keyring.c:793\n\nThis issue was also reported by syzbot.\n\nIt can be reproduced by following these steps(more details [1]):\n1. Obtain more than 32 inputs that have similar hashes, which ends with the\n pattern '0xxxxxxxe6'.\n2. Reboot and add the keys obtained in step 1.\n\nThe reproducer demonstrates how this issue happened:\n1. In the search_nested_keyrings function, when it iterates through the\n slots in a node(below tag ascend_to_node), if the slot pointer is meta\n and node->back_pointer != NULL(it means a root), it will proceed to\n descend_to_node. However, there is an exception. If node is the root,\n and one of the slots points to a shortcut, it will be treated as a\n keyring.\n2. Whether the ptr is keyring decided by keyring_ptr_is_keyring function.\n However, KEYRING_PTR_SUBTYPE is 0x2UL, the same as\n ASSOC_ARRAY_PTR_SUBTYPE_MASK.\n3. When 32 keys with the similar hashes are added to the tree, the ROOT\n has keys with hashes that are not similar (e.g. slot 0) and it splits\n NODE A without using a shortcut. When NODE A is filled with keys that\n all hashes are xxe6, the keys are similar, NODE A will split with a\n shortcut. Finally, it forms the tree as shown below, where slot 6 points\n to a shortcut.\n\n NODE A\n +------>+---+\n ROOT | | 0 | xxe6\n +---+ | +---+\n xxxx | 0 | shortcut : : xxe6\n +---+ | +---+\n xxe6 : : | | | xxe6\n +---+ | +---+\n | 6 |---+ : : xxe6\n +---+ +---+\n xxe6 : : | f | xxe6\n +---+ +---+\n xxe6 | f |\n +---+\n\n4. As mentioned above, If a slot(slot 6) of the root points to a shortcut,\n it may be mistakenly transferred to a key*, leading to a read\n out-of-bounds read.\n\nTo fix this issue, one should jump to descend_to_node if the ptr is a\nshortcut, regardless of whether the node is root or not.\n\n[1] https://lore.kernel.org/linux-kernel/1cfa878e-8c7b-4570-8606-21daf5e13ce7@huaweicloud.com/\n\n[jarkko: tweaked the commit message a bit to have an appropriate closes\n tag.]"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: security/keys: corrección de slab-out-of-bounds en key_task_permission KASAN informa una lectura fuera de los límites: ERROR: KASAN: slab-out-of-bounds en __kuid_val include/linux/uidgid.h:36 ERROR: KASAN: slab-out-of-bounds en uid_eq include/linux/uidgid.h:63 [en línea] ERROR: KASAN: slab-out-of-bounds en key_task_permission+0x394/0x410 security/keys/permission.c:54 Lectura de tamaño 4 en la dirección ffff88813c3ab618 por la tarea stress-ng/4362 CPU: 2 PID: 4362 Comm: stress-ng No contaminado 5.10.0-14930-gafbffd6c3ede #15 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:82 [en línea] dump_stack+0x107/0x167 lib/dump_stack.c:123 print_address_description.constprop.0+0x19/0x170 mm/kasan/report.c:400 __kasan_report.cold+0x6c/0x84 mm/kasan/report.c:560 kasan_report+0x3a/0x50 mm/kasan/report.c:585 __kuid_val include/linux/uidgid.h:36 [en línea] uid_eq include/linux/uidgid.h:63 [en línea] key_task_permission+0x394/0x410 security/keys/permission.c:54 search_nested_keyrings+0x90e/0xe90 security/keys/keyring.c:793 Este problema también fue informado por syzbot. Puede reproducirse siguiendo estos pasos (más detalles [1]): 1. Obtenga más de 32 entradas que tengan hashes similares, que terminen con el patrón '0xxxxxxxe6'. 2. Reinicie y agregue las claves obtenidas en el paso 1. El reproductor demuestra cómo sucedió este problema: 1. En la función search_nested_keyrings, cuando itera a través de las ranuras en un nodo (debajo de la etiqueta ascend_to_node), si el puntero de la ranura es meta y node->back_pointer != NULL (significa una raíz), procederá a descend_to_node. Sin embargo, hay una excepción. Si el nodo es la raíz y una de las ranuras apunta a un acceso directo, se tratará como un llavero. 2. Si el ptr es un llavero lo decide la función keyring_ptr_is_keyring. Sin embargo, KEYRING_PTR_SUBTYPE es 0x2UL, lo mismo que ASSOC_ARRAY_PTR_SUBTYPE_MASK. 3. Cuando se agregan 32 claves con hashes similares al árbol, la RAÍZ tiene claves con hashes que no son similares (por ejemplo, la ranura 0) y divide el NODO A sin usar un acceso directo. Cuando el NODO A se llena con claves en las que todos los hashes son xxe6, las claves son similares, el NODO A se dividirá con un acceso directo. Finalmente, forma el árbol como se muestra a continuación, donde la ranura 6 apunta a un acceso directo. NODO A +------>+---+ RAÍZ | | 0 | xxe6 +---+ | +---+ xxxx | 0 | acceso directo : : xxe6 +---+ | +---+ xxe6 : : | | | xxe6 +---+ | +---+ | 6 |---+ : : xxe6 +---+ +---+ xxe6 : : | f | xxe6 +---+ +---+ xxe6 | f | +---+ 4. Como se mencionó anteriormente, si una ranura (ranura 6) de la raíz apunta a un acceso directo, puede transferirse por error a una clave*, lo que lleva a una lectura fuera de los límites. Para solucionar este problema, uno debe saltar a descend_to_node si el ptr es un acceso directo, independientemente de si el nodo es raíz o no. [1] https://lore.kernel.org/linux-kernel/1cfa878e-8c7b-4570-8606-21daf5e13ce7@huaweicloud.com/ [jarkko: modifiqué un poco el mensaje de confirmación para tener una etiqueta de cierre apropiada]."
}
],
"lastModified": "2026-08-04T11:21:44.343",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6F34367D-A869-4C97-A01F-F5209F24FC10",
"versionEndExcluding": "4.19.324",
"versionStartIncluding": "3.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9952C897-8A61-4D4B-9D6D-7D063E9EA15E",
"versionEndExcluding": "5.4.286",
"versionStartIncluding": "4.20"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BF5B32D0-72C9-41C3-A0BB-D4946153C134",
"versionEndExcluding": "5.10.230",
"versionStartIncluding": "5.5"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "88812664-4296-42AC-AE0F-ED71086C1BB1",
"versionEndExcluding": "5.15.172",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0DD7F755-2F6B-4707-8973-78496AD5AA8E",
"versionEndExcluding": "6.1.117",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "630ED7EB-C97E-4435-B884-1E309E40D6F3",
"versionEndExcluding": "6.6.61",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0BD000F7-3DAD-4DD3-8906-98EA1EC67E95",
"versionEndExcluding": "6.11.8",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E0F717D8-3014-4F84-8086-0124B2111379"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "24DBE6C7-2AAE-4818-AED2-E131F153D2FA"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc6:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "24B88717-53F5-42AA-9B72-14C707639E3F"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}