smb: client: clear ce->tgthint in free_tgts()
In the Linux kernel, the following vulnerability has been resolved: smb: client: clear ce->tgthint in free_tgts() When free_tgts() frees all structures in ce->tlist, ce->tgthint is left pointing to one of the freed cache_dfs_tgt structures. If ce->tgthint is not reset before it is used later, it results in a use-after-free. Set ce->tgthint to NULL in free_tgts() after the elements are freed to reflect that no elements remain.
CVE-2026-89636
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89636
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "54be1f6c1c37498bba557049df646cc239fa37e3",
"lessThan": "14f60e959b5ac813715ff72e127beb3584ddabf6",
"versionType": "git"
},
{
"status": "affected",
"version": "54be1f6c1c37498bba557049df646cc239fa37e3",
"lessThan": "3ff9462bb7a06d8d32a1dc02d39580b078ec9e55",
"versionType": "git"
},
{
"status": "affected",
"version": "54be1f6c1c37498bba557049df646cc239fa37e3",
"lessThan": "7507bd1885643d0461a6017767492450af1ce2a3",
"versionType": "git"
},
{
"status": "affected",
"version": "54be1f6c1c37498bba557049df646cc239fa37e3",
"lessThan": "9ab46a13798a61d9d020b01d4e57efdabe6624fa",
"versionType": "git"
},
{
"status": "affected",
"version": "54be1f6c1c37498bba557049df646cc239fa37e3",
"lessThan": "5baab40404a9393bcc0b7b8f1950bf2c307e0984",
"versionType": "git"
},
{
"status": "affected",
"version": "54be1f6c1c37498bba557049df646cc239fa37e3",
"lessThan": "b1b741cf8e7ce1b91d937e23decd3d3358748700",
"versionType": "git"
}
],
"programFiles": [
"fs/smb/client/dfs_cache.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/dfs_cache.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89636
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #35137 · Revision 1
- Added to Heist Feed
- Publisher date