CVE-2026-80622
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
char: tlclk: fix use-after-free in tlclk_cleanup()
In the Linux kernel, the following vulnerability has been resolved: char: tlclk: fix use-after-free in tlclk_cleanup() This patch improves the module cleanup process in the tlclk driver to prevent potential use-after-free and race conditions. Currently, the file_operations structure does not specify the .owner field, which could allow the module to be unloaded while user-space processes are still interacting with the device. Additionally, the tlclk_cleanup() function frees the alarm_events memory before ensuring that blocked processes in the waitqueue are fully awakened and that the switchover_timer has completed. To address these cases, this patch: - Sets '.owner = THIS_MODULE' in tlclk_fops to safely defer module unloading while the device is in use. - Updates tlclk_cleanup() to explicitly wake up all blocked readers (wake_up_all), properly release hardware I/O regions, and safely delete the timer (timer_delete_sync) prior to freeing memory.
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) |
|---|---|---|---|---|---|
| 1a80ba88273097933f93b1f40537337416798c70 | affected | git | 09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a | Unavailable | None listed |
| 1a80ba88273097933f93b1f40537337416798c70 | affected | git | 96902299a22d126ef5eb3f45cd5d8ceea9e6a735 | Unavailable | None listed |
| 1a80ba88273097933f93b1f40537337416798c70 | affected | git | 166dd1d5265e067459e674c11688919901813ec2 | Unavailable | None listed |
| 1a80ba88273097933f93b1f40537337416798c70 | affected | git | 764723bd67a6c8f53a8d8309211fb039e2ebcf49 | Unavailable | None listed |
| 1a80ba88273097933f93b1f40537337416798c70 | affected | git | c3f0cd76561ae611c2d247ee96dfd559e4197cb7 | Unavailable | None listed |
| 1a80ba88273097933f93b1f40537337416798c70 | affected | git | 3d5e4cc0d9dce79b0429da3134ac7b072ab9009f | Unavailable | None listed |
| 1a80ba88273097933f93b1f40537337416798c70 | affected | git | 42223445607a9a5df3cb1c4729abfe3a5085e7ce | Unavailable | None listed |
| 1a80ba88273097933f93b1f40537337416798c70 | affected | git | bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1 | 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) |
|---|---|---|---|---|---|
| 2.6.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.15 | Unavailable | None listed |
| 5.10.261 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.212 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.97 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.40 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.5 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |