CVE-2024-50015
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
ext4: dax: fix overflowing extents beyond inode size when partially writing
The dax_iomap_rw() does two things in each iteration: map written blocks and copy user data to blocks. If the process is killed by user(See signal handling in dax_iomap_iter()), the copied data will be returned and added on inode size, which means that the length of written extents may exceed the inode size, then fsck will fail. An example is given as:
fsck reports: Inode 13, i_size is 2097152, should be 4194304. Fix?
Fix the problem by truncating extents if the written length is smaller than expected.
Detalles técnicos trazas, registros y código del informe original
dd if=/dev/urandom of=file bs=4M count=1
dax_iomap_rw
iomap_iter // round 1
ext4_iomap_begin
ext4_iomap_alloc // allocate 0~2M extents(written flag)
dax_iomap_iter // copy 2M data
iomap_iter // round 2
iomap_iter_advance
iter->pos += iter->processed // iter->pos = 2M
ext4_iomap_begin
ext4_iomap_alloc // allocate 2~4M extents(written flag)
dax_iomap_iter
fatal_signal_pending
done = iter->pos - iocb->ki_pos // done = 2M
ext4_handle_inode_extension
ext4_update_inode_size // inode size = 2MCVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.24%
- Percentil entre todas las CVEs puntuadas: 14
- 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).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/5efccdee4a7d507a483f20f880b809cc4eaef14d
- https://git.kernel.org/stable/c/8c30a9a8610c314554997f86370140746aa35661
- https://git.kernel.org/stable/c/a9f331f51515bdb3ebc8d0963131af367ef468f6
- https://git.kernel.org/stable/c/abfaa876b948baaea4d14f21a1963789845c8b4c
- https://git.kernel.org/stable/c/dda898d7ffe85931f9cca6d702a51f33717c501e
- https://git.kernel.org/stable/c/ec0dd451e236c46e4858d53e9e82bae7797a7af5
- https://git.kernel.org/stable/c/f8a7c342326f6ad1dfdb30a18dd013c70f5e9669
- 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
JSON original (NVD)
Mostrar
{
"id": "CVE-2024-50015",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-50015",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2024-10-22T13:28:08.580885Z"
}
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"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": "776722e85d3b0936253ecc3d14db4fba37f191ba",
"lessThan": "f8a7c342326f6ad1dfdb30a18dd013c70f5e9669",
"versionType": "git"
},
{
"status": "affected",
"version": "776722e85d3b0936253ecc3d14db4fba37f191ba",
"lessThan": "8c30a9a8610c314554997f86370140746aa35661",
"versionType": "git"
},
{
"status": "affected",
"version": "776722e85d3b0936253ecc3d14db4fba37f191ba",
"lessThan": "abfaa876b948baaea4d14f21a1963789845c8b4c",
"versionType": "git"
},
{
"status": "affected",
"version": "776722e85d3b0936253ecc3d14db4fba37f191ba",
"lessThan": "5efccdee4a7d507a483f20f880b809cc4eaef14d",
"versionType": "git"
},
{
"status": "affected",
"version": "776722e85d3b0936253ecc3d14db4fba37f191ba",
"lessThan": "a9f331f51515bdb3ebc8d0963131af367ef468f6",
"versionType": "git"
},
{
"status": "affected",
"version": "776722e85d3b0936253ecc3d14db4fba37f191ba",
"lessThan": "ec0dd451e236c46e4858d53e9e82bae7797a7af5",
"versionType": "git"
},
{
"status": "affected",
"version": "776722e85d3b0936253ecc3d14db4fba37f191ba",
"lessThan": "dda898d7ffe85931f9cca6d702a51f33717c501e",
"versionType": "git"
}
],
"programFiles": [
"fs/ext4/file.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.227",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.168",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.113",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.55",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.10.14",
"versionType": "semver",
"lessThanOrEqual": "6.10.*"
},
{
"status": "unaffected",
"version": "6.11.3",
"versionType": "semver",
"lessThanOrEqual": "6.11.*"
},
{
"status": "unaffected",
"version": "6.12",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ext4/file.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"
}
]
}
],
"published": "2024-10-21T19:15:04.890",
"references": [
{
"url": "https://git.kernel.org/stable/c/5efccdee4a7d507a483f20f880b809cc4eaef14d",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8c30a9a8610c314554997f86370140746aa35661",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a9f331f51515bdb3ebc8d0963131af367ef468f6",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/abfaa876b948baaea4d14f21a1963789845c8b4c",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/dda898d7ffe85931f9cca6d702a51f33717c501e",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ec0dd451e236c46e4858d53e9e82bae7797a7af5",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f8a7c342326f6ad1dfdb30a18dd013c70f5e9669",
"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"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: dax: fix overflowing extents beyond inode size when partially writing\n\nThe dax_iomap_rw() does two things in each iteration: map written blocks\nand copy user data to blocks. If the process is killed by user(See signal\nhandling in dax_iomap_iter()), the copied data will be returned and added\non inode size, which means that the length of written extents may exceed\nthe inode size, then fsck will fail. An example is given as:\n\ndd if=/dev/urandom of=file bs=4M count=1\n dax_iomap_rw\n iomap_iter // round 1\n ext4_iomap_begin\n ext4_iomap_alloc // allocate 0~2M extents(written flag)\n dax_iomap_iter // copy 2M data\n iomap_iter // round 2\n iomap_iter_advance\n iter->pos += iter->processed // iter->pos = 2M\n ext4_iomap_begin\n ext4_iomap_alloc // allocate 2~4M extents(written flag)\n dax_iomap_iter\n fatal_signal_pending\n done = iter->pos - iocb->ki_pos // done = 2M\n ext4_handle_inode_extension\n ext4_update_inode_size // inode size = 2M\n\nfsck reports: Inode 13, i_size is 2097152, should be 4194304. Fix?\n\nFix the problem by truncating extents if the written length is smaller\nthan expected."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: dax: se corrige el desbordamiento de extensiones más allá del tamaño del inodo al escribir parcialmente. Dax_iomap_rw() hace dos cosas en cada iteración: asigna bloques escritos y copia datos de usuario a bloques. Si el usuario finaliza el proceso (consulte el manejo de señales en dax_iomap_iter()), los datos copiados se devolverán y se agregarán al tamaño del inodo, lo que significa que la longitud de las extensiones escritas puede exceder el tamaño del inodo, entonces fsck fallará. Se proporciona un ejemplo como: dd if=/dev/urandom of=file bs=4M count=1 dax_iomap_rw iomap_iter // ronda 1 ext4_iomap_begin ext4_iomap_alloc // asignar 0~2M de extensiones (bandera escrita) dax_iomap_iter // copiar 2M de datos iomap_iter // ronda 2 iomap_iter_advance iter->pos += iter->processed // iter->pos = 2M ext4_iomap_begin ext4_iomap_alloc // asignar 2~4M de extensiones (bandera escrita) dax_iomap_iter fatal_signal_pending hecho = iter->pos - iocb->ki_pos // hecho = 2M ext4_handle_inode_extension ext4_update_inode_size // tamaño de inodo = 2M fsck informa: Inodo 13, i_size es 2097152, debería ser 4194304. ¿Solución? Solucione el problema truncando las extensiones si la longitud escrita es menor a la esperada."
}
],
"lastModified": "2026-06-17T08:03:23.303",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3CDEE58F-38CA-430D-99B5-73349FB2715F",
"versionEndExcluding": "5.10.227",
"versionStartIncluding": "4.10"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4D51C05D-455B-4D8D-89E7-A58E140B864C",
"versionEndExcluding": "5.15.168",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE",
"versionEndExcluding": "6.1.113",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E90B9576-56C4-47BC-AAB0-C5B2D438F5D0",
"versionEndExcluding": "6.6.55",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4C16BCE0-FFA0-4599-BE0A-1FD65101C021",
"versionEndExcluding": "6.10.14",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "54D9C704-D679-41A7-9C40-10A6B1E7FFE9",
"versionEndExcluding": "6.11.3",
"versionStartIncluding": "6.11"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}