CVE-2021-47321
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
watchdog: Fix possible use-after-free by calling del_timer_sync()
In the Linux kernel, the following vulnerability has been resolved: watchdog: Fix possible use-after-free by calling del_timer_sync() This driver's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | 58606882ad8ec6c39e0f40344b922921ef94ab4d | Unavailable | None listed |
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | ca96b8ea5e74956071154bdb456778cc3027e79f | Unavailable | None listed |
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | 8bec568d7518b1504a602ed5376bb322e4dbb270 | Unavailable | None listed |
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | ecd620e0fb1ff7f78fdb593379b2e6938c99707a | Unavailable | None listed |
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | db222f1477ad5692cd454709b714949807e5d111 | Unavailable | None listed |
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | 66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4 | Unavailable | None listed |
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | 4c05dac488a660fe2925c047ecb119e7afaaeb1e | Unavailable | None listed |
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | 1a053c4d716898a53c2e31c574a70ea0c37044a3 | Unavailable | None listed |
| 7c25f8c9f67708e6464d2221bc311cbd99e950dc | affected | git | d0212f095ab56672f6f36aabc605bda205e1e0bf | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.3 | Unavailable | None listed |
| 4.4.276 | unaffected | semver | Unavailable | 4.4.* | None listed |
| 4.9.276 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.240 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.198 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.134 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.52 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.19 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13.4 | unaffected | semver | Unavailable | 5.13.* | None listed |
| 5.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |