ksmbd: add chann_lock to protect ksmbd_chann_list xarray
In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.
CVE-2026-23226
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-2026-23226
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": "1d9c4172110e645b383ff13eee759728d74f1a5d",
"lessThan": "43ad494ac6e940a8eabf25d5bd77bb3bb53b1153",
"versionType": "git"
},
{
"status": "affected",
"version": "1d9c4172110e645b383ff13eee759728d74f1a5d",
"lessThan": "4c2ca31608521895dd742a43beca4b4d29762345",
"versionType": "git"
},
{
"status": "affected",
"version": "1d9c4172110e645b383ff13eee759728d74f1a5d",
"lessThan": "e4a8a96a93d08570e0405cfd989a8a07e5b6ff33",
"versionType": "git"
},
{
"status": "affected",
"version": "1d9c4172110e645b383ff13eee759728d74f1a5d",
"lessThan": "36ef605c0395b94b826a8c8d6f2697071173de6e",
"versionType": "git"
},
{
"status": "affected",
"version": "1d9c4172110e645b383ff13eee759728d74f1a5d",
"lessThan": "4f3a06cc57976cafa8c6f716646be6c79a99e485",
"versionType": "git"
},
{
"status": "affected",
"version": "b1caecbf34b8c8260d851ec4efde71f3694460b7",
"versionType": "git"
},
{
"status": "affected",
"version": "91bbf9cb2387a0d76322e9a343bc6bc160f66b3f",
"versionType": "git"
},
{
"status": "affected",
"version": "853c416710b075153c1e1421e099ffbe5dac68ce",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.145",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.29",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.2.16",
"lessThan": "6.3",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/server/mgmt/user_session.c",
"fs/smb/server/mgmt/user_session.h",
"fs/smb/server/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": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.77",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.11",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.1",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/server/mgmt/user_session.c",
"fs/smb/server/mgmt/user_session.h",
"fs/smb/server/smb2pdu.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23226
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46114 · Revision 1
- Added to Heist Feed
- Publisher date