CVE-2025-38728
Estado: ModificadaAlta (7.1)—
In the Linux kernel, the following vulnerability has been resolved:
smb3: fix for slab out of bounds on mount to ksmbd
With KASAN enabled, it is possible to get a slab out of bounds during mount to ksmbd due to missing check in parse_server_interfaces() (see below):
Detalles técnicos trazas, registros y código del informe original
BUG: KASAN: slab-out-of-bounds in parse_server_interfaces+0x14ee/0x1880 [cifs] Read of size 4 at addr ffff8881433dba98 by task mount/9827 CPU: 5 UID: 0 PID: 9827 Comm: mount Tainted: G OE 6.16.0-rc2-kasan #2 PREEMPT(voluntary) Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE Hardware name: Dell Inc. Precision Tower 3620/0MWYPT, BIOS 2.13.1 06/14/2019 Call Trace: <TASK> dump_stack_lvl+0x9f/0xf0 print_report+0xd1/0x670 __virt_addr_valid+0x22c/0x430 ? parse_server_interfaces+0x14ee/0x1880 [cifs] ? kasan_complete_mode_report_info+0x2a/0x1f0 ? parse_server_interfaces+0x14ee/0x1880 [cifs] kasan_report+0xd6/0x110 parse_server_interfaces+0x14ee/0x1880 [cifs] __asan_report_load_n_noabort+0x13/0x20 parse_server_interfaces+0x14ee/0x1880 [cifs] ? __pfx_parse_server_interfaces+0x10/0x10 [cifs] ? trace_hardirqs_on+0x51/0x60 SMB3_request_interfaces+0x1ad/0x3f0 [cifs] ? __pfx_SMB3_request_interfaces+0x10/0x10 [cifs] ? SMB2_tcon+0x23c/0x15d0 [cifs] smb3_qfs_tcon+0x173/0x2b0 [cifs] ? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs] ? cifs_get_tcon+0x105d/0x2120 [cifs] ? do_raw_spin_unlock+0x5d/0x200 ? cifs_get_tcon+0x105d/0x2120 [cifs] ? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs] cifs_mount_get_tcon+0x369/0xb90 [cifs] ? dfs_cache_find+0xe7/0x150 [cifs] dfs_mount_share+0x985/0x2970 [cifs] ? check_path.constprop.0+0x28/0x50 ? save_trace+0x54/0x370 ? __pfx_dfs_mount_share+0x10/0x10 [cifs] ? __lock_acquire+0xb82/0x2ba0 ? __kasan_check_write+0x18/0x20 cifs_mount+0xbc/0x9e0 [cifs] ? __pfx_cifs_mount+0x10/0x10 [cifs] ? do_raw_spin_unlock+0x5d/0x200 ? cifs_setup_cifs_sb+0x29d/0x810 [cifs] cifs_smb3_do_mount+0x263/0x1990 [cifs]
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: 0.32%
- Percentil entre todas las CVEs puntuadas: 23
- 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
T1499.004Application or System Exploitationimpact80 %
Acceso local sin interacción (AV:L/PR:L/UI:N) permite explotar slab out-of-bounds en parse_server_interfaces() causando DoS por lectura fuera de límites; impacto de disponibilidad (A:H).
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 (2)
CWE
- CWE-125
Referencias
- https://git.kernel.org/stable/c/7d34ec36abb84fdfb6632a0f2cbda90379ae21fc
- https://git.kernel.org/stable/c/8de33d4d72e8fae3502ec3850bd7b14e7c7328b6
- https://git.kernel.org/stable/c/9bdb8e98a0073c73ab3e6c631ec78877ceb64565
- https://git.kernel.org/stable/c/a0620e1525663edd8c4594f49fb75fe5be4724b0
- https://git.kernel.org/stable/c/a542f93a123555d09c3ce8bc947f7b56ad8e6463
- https://git.kernel.org/stable/c/f6eda5b0e8f8123564c5b34f5801d63243032eac
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-38728",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.1,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.2,
"exploitabilityScore": 3.9
},
{
"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
}
]
},
"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": "fe856be475f7cf5ffcde57341d175ce9fd09434b",
"lessThan": "9bdb8e98a0073c73ab3e6c631ec78877ceb64565",
"versionType": "git"
},
{
"status": "affected",
"version": "fe856be475f7cf5ffcde57341d175ce9fd09434b",
"lessThan": "a0620e1525663edd8c4594f49fb75fe5be4724b0",
"versionType": "git"
},
{
"status": "affected",
"version": "fe856be475f7cf5ffcde57341d175ce9fd09434b",
"lessThan": "8de33d4d72e8fae3502ec3850bd7b14e7c7328b6",
"versionType": "git"
},
{
"status": "affected",
"version": "fe856be475f7cf5ffcde57341d175ce9fd09434b",
"lessThan": "a542f93a123555d09c3ce8bc947f7b56ad8e6463",
"versionType": "git"
},
{
"status": "affected",
"version": "fe856be475f7cf5ffcde57341d175ce9fd09434b",
"lessThan": "f6eda5b0e8f8123564c5b34f5801d63243032eac",
"versionType": "git"
},
{
"status": "affected",
"version": "fe856be475f7cf5ffcde57341d175ce9fd09434b",
"lessThan": "7d34ec36abb84fdfb6632a0f2cbda90379ae21fc",
"versionType": "git"
}
],
"programFiles": [
"fs/smb/client/smb2ops.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.149",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.103",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.43",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.11",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16.2",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/smb2ops.c"
],
"defaultStatus": "affected"
}
]
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"affectedData": [
{
"vendor": "Siemens",
"product": "SIMATIC CN 4100",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "V5.0",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]
}
],
"published": "2025-09-04T16:15:42.867",
"references": [
{
"url": "https://git.kernel.org/stable/c/7d34ec36abb84fdfb6632a0f2cbda90379ae21fc",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8de33d4d72e8fae3502ec3850bd7b14e7c7328b6",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9bdb8e98a0073c73ab3e6c631ec78877ceb64565",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a0620e1525663edd8c4594f49fb75fe5be4724b0",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a542f93a123555d09c3ce8bc947f7b56ad8e6463",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f6eda5b0e8f8123564c5b34f5801d63243032eac",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb3: fix for slab out of bounds on mount to ksmbd\n\nWith KASAN enabled, it is possible to get a slab out of bounds\nduring mount to ksmbd due to missing check in parse_server_interfaces()\n(see below):\n\n BUG: KASAN: slab-out-of-bounds in\n parse_server_interfaces+0x14ee/0x1880 [cifs]\n Read of size 4 at addr ffff8881433dba98 by task mount/9827\n\n CPU: 5 UID: 0 PID: 9827 Comm: mount Tainted: G\n OE 6.16.0-rc2-kasan #2 PREEMPT(voluntary)\n Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n Hardware name: Dell Inc. Precision Tower 3620/0MWYPT,\n BIOS 2.13.1 06/14/2019\n Call Trace:\n <TASK>\n dump_stack_lvl+0x9f/0xf0\n print_report+0xd1/0x670\n __virt_addr_valid+0x22c/0x430\n ? parse_server_interfaces+0x14ee/0x1880 [cifs]\n ? kasan_complete_mode_report_info+0x2a/0x1f0\n ? parse_server_interfaces+0x14ee/0x1880 [cifs]\n kasan_report+0xd6/0x110\n parse_server_interfaces+0x14ee/0x1880 [cifs]\n __asan_report_load_n_noabort+0x13/0x20\n parse_server_interfaces+0x14ee/0x1880 [cifs]\n ? __pfx_parse_server_interfaces+0x10/0x10 [cifs]\n ? trace_hardirqs_on+0x51/0x60\n SMB3_request_interfaces+0x1ad/0x3f0 [cifs]\n ? __pfx_SMB3_request_interfaces+0x10/0x10 [cifs]\n ? SMB2_tcon+0x23c/0x15d0 [cifs]\n smb3_qfs_tcon+0x173/0x2b0 [cifs]\n ? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs]\n ? cifs_get_tcon+0x105d/0x2120 [cifs]\n ? do_raw_spin_unlock+0x5d/0x200\n ? cifs_get_tcon+0x105d/0x2120 [cifs]\n ? __pfx_smb3_qfs_tcon+0x10/0x10 [cifs]\n cifs_mount_get_tcon+0x369/0xb90 [cifs]\n ? dfs_cache_find+0xe7/0x150 [cifs]\n dfs_mount_share+0x985/0x2970 [cifs]\n ? check_path.constprop.0+0x28/0x50\n ? save_trace+0x54/0x370\n ? __pfx_dfs_mount_share+0x10/0x10 [cifs]\n ? __lock_acquire+0xb82/0x2ba0\n ? __kasan_check_write+0x18/0x20\n cifs_mount+0xbc/0x9e0 [cifs]\n ? __pfx_cifs_mount+0x10/0x10 [cifs]\n ? do_raw_spin_unlock+0x5d/0x200\n ? cifs_setup_cifs_sb+0x29d/0x810 [cifs]\n cifs_smb3_do_mount+0x263/0x1990 [cifs]"
}
],
"lastModified": "2026-07-30T06:23:37.840",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3A2B4825-A450-4C76-982A-FF51D62F7B4B",
"versionEndExcluding": "6.1.149",
"versionStartIncluding": "4.18.1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F2293654-7169-49B5-8D0D-EE51EF8B8E48",
"versionEndExcluding": "6.6.103",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "472C5F87-2BF3-4FAB-9B21-DA7513977363",
"versionEndExcluding": "6.12.43",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BC242347-F722-43AE-B910-BE0B22386977",
"versionEndExcluding": "6.15.11",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BD7C087D-2415-4521-B624-30003352F899",
"versionEndExcluding": "6.16.2",
"versionStartIncluding": "6.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6AE7DC47-EAFA-42D5-BCF5-C7039EE3D771"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "81EBA79F-0ABF-4213-8BEF-9A927F9E24D4"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "364BE028-0C54-4254-9261-59D97C0EDC1F"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C5CD0194-46B1-4CCC-9829-8ED014B77660"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc5:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DB2B91AF-ACE1-4F6F-B2D0-9D4B7D8D20CE"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc6:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "30FBD992-DD41-441E-A6C7-D39DAC45DA34"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc7:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "10979D17-76B4-465F-A475-78680FBECEBD"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:4.18:rc8:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "56BF1EDD-3351-4E3E-AD42-54AF093ADB89"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "327D22EF-390B-454C-BD31-2ED23C998A1C"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}