CVE-2024-35887 Affecting kernel-64kb-devel package, versions <6.4.0-150600.23.7.3
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Test your applications- Snyk ID SNYK-SLES156-KERNEL64KBDEVEL-7717713
- published 20 Aug 2024
- disclosed 25 Jun 2024
Introduced: 25 Jun 2024
CVE-2024-35887 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 kernel-64kb-devel to version 6.4.0-150600.23.7.3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-64kb-devel package and not the kernel-64kb-devel package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ax25: fix use-after-free bugs caused by ax25_ds_del_timer
When the ax25 device is detaching, the ax25_dev_device_down() calls ax25_ds_del_timer() to cleanup the slave_timer. When the timer handler is running, the ax25_ds_del_timer() that calls del_timer() in it will return directly. As a result, the use-after-free bugs could happen, one of the scenarios is shown below:
(Thread 1) | (Thread 2)
| ax25_ds_timeout()
ax25_dev_device_down() | ax25_ds_del_timer() | del_timer() | ax25_dev_put() //FREE | | ax25_dev-> //USE
In order to mitigate bugs, when the device is detaching, use timer_shutdown_sync() to stop the timer.
References
- https://www.suse.com/security/cve/CVE-2024-35887.html
- https://bugzilla.suse.com/1224663
- https://git.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19b
- https://git.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9
- https://git.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89