wifi: brcmsmac: fix UAF in brcms_free_timer()
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmsmac: fix UAF in brcms_free_timer() brcms_free_timer() calls brcms_del_timer() which uses the non-synchronous cancel_delayed_work() to cancel the timer's underlying delayed work. If the work callback (_brcms_timer) is already running, cancel_delayed_work() returns false without waiting, and brcms_free_timer() proceeds to kfree(t) while the callback still accesses t through container_of(). Add an explicit cancel_delayed_work_sync() after brcms_del_timer() to guarantee that any in-flight callback has completed before the timer structure is freed.
CVE-2026-98196
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-2026-98196
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": "5b435de0d786869c95d1962121af0d7df2542009",
"lessThan": "10eeb0b29fd7f52487c9ae573e8d79c210a0095d",
"versionType": "git"
},
{
"status": "affected",
"version": "5b435de0d786869c95d1962121af0d7df2542009",
"lessThan": "74acccc928851f69184271832d690607877122af",
"versionType": "git"
},
{
"status": "affected",
"version": "5b435de0d786869c95d1962121af0d7df2542009",
"lessThan": "050d2486e8ed2c0a23b87249ccd23e8072721391",
"versionType": "git"
},
{
"status": "affected",
"version": "5b435de0d786869c95d1962121af0d7df2542009",
"lessThan": "856dabd5f2617efb23c043be9e1b22a9e6e97c41",
"versionType": "git"
},
{
"status": "affected",
"version": "5b435de0d786869c95d1962121af0d7df2542009",
"lessThan": "2a4841ff0b74b495cddd31ae324e922217fc2f13",
"versionType": "git"
},
{
"status": "affected",
"version": "5b435de0d786869c95d1962121af0d7df2542009",
"lessThan": "1edb3ddd261e973a4d577c0547e63bfa25a8170d",
"versionType": "git"
},
{
"status": "affected",
"version": "5b435de0d786869c95d1962121af0d7df2542009",
"lessThan": "777cb6bba59e875b16a1d8897a483a5fecfcd5d2",
"versionType": "git"
},
{
"status": "affected",
"version": "5b435de0d786869c95d1962121af0d7df2542009",
"lessThan": "1eeca1d5e0920fbdad6449768fd2d4364e714180",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"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",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98196
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38277 · Revision 1
- Added to Heist Feed
- Publisher date