Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1a80ba88273097933f93b1f40537337416798c70 before 09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a; affected 1a80ba88273097933f93b1f40537337416798c70 before 96902299a22d126ef5eb3f45cd5d8ceea9e6a735; affected 1a80ba88273097933f93b1f40537337416798c70 before 166dd1d5265e067459e674c11688919901813ec2; affected 1a80ba88273097933f93b1f40537337416798c70 before 764723bd67a6c8f53a8d8309211fb039e2ebcf49; affected 1a80ba88273097933f93b1f40537337416798c70 before c3f0cd76561ae611c2d247ee96dfd559e4197cb7; affected 1a80ba88273097933f93b1f40537337416798c70 before 3d5e4cc0d9dce79b0429da3134ac7b072ab9009f; affected 1a80ba88273097933f93b1f40537337416798c70 before 42223445607a9a5df3cb1c4729abfe3a5085e7ce; affected 1a80ba88273097933f93b1f40537337416798c70 before bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1 |
| Linux / Linux | affected 2.6.15; unaffected 0 before 2.6.15; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a
- https://git.kernel.org/stable/c/96902299a22d126ef5eb3f45cd5d8ceea9e6a735
- https://git.kernel.org/stable/c/166dd1d5265e067459e674c11688919901813ec2
- https://git.kernel.org/stable/c/764723bd67a6c8f53a8d8309211fb039e2ebcf49
- https://git.kernel.org/stable/c/c3f0cd76561ae611c2d247ee96dfd559e4197cb7
- https://git.kernel.org/stable/c/3d5e4cc0d9dce79b0429da3134ac7b072ab9009f
- https://git.kernel.org/stable/c/42223445607a9a5df3cb1c4729abfe3a5085e7ce
- https://git.kernel.org/stable/c/bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1
ADP enrichment
No English description supplied.
No references supplied.