CVE-2026-98261
In the Linux kernel, the following vulnerability has been resolved:
cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
When a secondary channel is no longer supported by the server, cifs_chan_skip_or_disable() drops the channel reference with cifs_put_tcp_session() and then continues to use the server pointer by calling cifs_signal_cifsd_for_reconnect() on it and reading its primary_server pointer. cifs_put_tcp_session() can drop the last reference of the channel and tear it down, so both the channel and the primary server (whose reference is also dropped by cifs_put_tcp_session()) can be freed before they are signaled for reconnect.
Leer descripción completaMostrar menos
Signal the channel and the primary server and capture the primary server pointer before dropping the channel reference with cifs_put_tcp_session().
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 6
- 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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/0338489960ddad6368bce55e8adbc176c523093d
- https://git.kernel.org/stable/c/717e0a25036b6c92cecace30913b2d874a4c22b8
- https://git.kernel.org/stable/c/7a1b27780b113583a94256d58dabfe7c0d9286e7
- https://git.kernel.org/stable/c/edd52eae5fcfb8433b6bb0e7cd98db438fe01227
- https://git.kernel.org/stable/c/fcc0a935bb6e37ecbf7e4335061309f896f35780
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98261",
"cveTags": [],
"metrics": {},
"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": "50e8363ecc85da49764781da90ebffe1a657b370",
"lessThan": "0338489960ddad6368bce55e8adbc176c523093d",
"versionType": "git"
},
{
"status": "affected",
"version": "f591062bdbf4742b7f1622173017f19e927057b0",
"lessThan": "edd52eae5fcfb8433b6bb0e7cd98db438fe01227",
"versionType": "git"
},
{
"status": "affected",
"version": "f591062bdbf4742b7f1622173017f19e927057b0",
"lessThan": "fcc0a935bb6e37ecbf7e4335061309f896f35780",
"versionType": "git"
},
{
"status": "affected",
"version": "f591062bdbf4742b7f1622173017f19e927057b0",
"lessThan": "7a1b27780b113583a94256d58dabfe7c0d9286e7",
"versionType": "git"
},
{
"status": "affected",
"version": "f591062bdbf4742b7f1622173017f19e927057b0",
"lessThan": "717e0a25036b6c92cecace30913b2d874a4c22b8",
"versionType": "git"
},
{
"status": "affected",
"version": "d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.15",
"lessThan": "6.6.158",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.7.3",
"lessThan": "6.8",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/smb2pdu.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc4",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/smb2pdu.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-06T09:18:15.200",
"references": [
{
"url": "https://git.kernel.org/stable/c/0338489960ddad6368bce55e8adbc176c523093d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/717e0a25036b6c92cecace30913b2d874a4c22b8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7a1b27780b113583a94256d58dabfe7c0d9286e7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/edd52eae5fcfb8433b6bb0e7cd98db438fe01227",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fcc0a935bb6e37ecbf7e4335061309f896f35780",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix server use-after-free in cifs_chan_skip_or_disable()\n\nWhen a secondary channel is no longer supported by the server,\ncifs_chan_skip_or_disable() drops the channel reference with\ncifs_put_tcp_session() and then continues to use the server pointer by\ncalling cifs_signal_cifsd_for_reconnect() on it and reading its\nprimary_server pointer. cifs_put_tcp_session() can drop the last\nreference of the channel and tear it down, so both the channel and the\nprimary server (whose reference is also dropped by\ncifs_put_tcp_session()) can be freed before they are signaled for\nreconnect.\n\nSignal the channel and the primary server and capture the primary\nserver pointer before dropping the channel reference with\ncifs_put_tcp_session()."
}
],
"lastModified": "2026-10-06T09:18:15.200",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}