watchdog: at91sam9_wdt: prevent timer rearm during teardown
In the Linux kernel, the following vulnerability has been resolved: watchdog: at91sam9_wdt: prevent timer rearm during teardown at91_ping() rearms the watchdog timer from its callback. timer_delete() neither waits for a running callback nor prevents it from rearming the timer, so probe failure or driver removal can leave the timer accessing the devm-allocated at91wdt after it has been freed. Use timer_shutdown_sync() on both teardown paths. It waits for a running callback and rejects any attempt by the callback to rearm the timer.
CVE-2026-74687
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-2026-74687
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": "5161b31dc39a6d6dadc95f298de48a725b73ada8",
"lessThan": "a9e0efcb1125e6b452c648671f15920c4955b681",
"versionType": "git"
},
{
"status": "affected",
"version": "5161b31dc39a6d6dadc95f298de48a725b73ada8",
"lessThan": "1beb4dd6a30dea699e98990dd61f892ed1c0985e",
"versionType": "git"
},
{
"status": "affected",
"version": "5161b31dc39a6d6dadc95f298de48a725b73ada8",
"lessThan": "29fe74c9aa69d78c1c6a3930f1d9fc5db71a6eed",
"versionType": "git"
},
{
"status": "affected",
"version": "5161b31dc39a6d6dadc95f298de48a725b73ada8",
"lessThan": "b7949b0a7d998013b7ec8617a0ef5b07cca80be4",
"versionType": "git"
},
{
"status": "affected",
"version": "5161b31dc39a6d6dadc95f298de48a725b73ada8",
"lessThan": "8444d66aa6b6e7fe0a26fa1a00a11cb4d0523783",
"versionType": "git"
}
],
"programFiles": [
"drivers/watchdog/at91sam9_wdt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/watchdog/at91sam9_wdt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74687
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46586 · Revision 1
- Added to Heist Feed
- Publisher date