UBUNTU-CVE-2024-38630
In the Linux kernel, the following vulnerability has been resolved: watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger When the cpu5wdt module is removing, the origin code uses del_timer() to de-activate the timer. If the timer handler is running, del_timer() could not stop it and will return directly. If the port region is released by release_region() and then the timer handler cpu5wdt_trigger() calls outb() to write into the region that is released, the use-after-free bug will happen. Change del_timer() to timer_shutdown_sync() in order that the timer handler could be finished before the port region is released.
02 / AFFECTED SOFTWARE
Affected packages
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03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger When the cpu5wdt module is removing, the origin code uses del_timer() to de-activate the timer. If the timer handler is running, del_timer() could not stop it and will return directly. If the port region is released by release_region() and then the timer handler cpu5wdt_trigger() calls outb() to write into the region that is released, the use-after-free bug will happen. Change del_timer() to timer_shutdown_sync() in order that the timer handler could be finished before the port region is released.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/573601521277119f2e2ba5f28ae6e87fc594f4d4
- https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4
- https://git.kernel.org/stable/c/9b1c063ffc075abf56f63e55d70b9778ff534314
- https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784a
- https://ubuntu.com/security/CVE-2024-38630
- https://ubuntu.com/security/notices/USN-6999-1
- https://ubuntu.com/security/notices/USN-6999-2
- https://ubuntu.com/security/notices/USN-7004-1
- https://ubuntu.com/security/notices/USN-7005-1
- https://ubuntu.com/security/notices/USN-7005-2
- https://ubuntu.com/security/notices/USN-7008-1
- https://ubuntu.com/security/notices/USN-7029-1
- https://ubuntu.com/security/notices/USN-7069-1
- https://ubuntu.com/security/notices/USN-7069-2
- https://ubuntu.com/security/notices/USN-7072-1
- https://ubuntu.com/security/notices/USN-7072-2
- https://ubuntu.com/security/notices/USN-7073-1
- https://ubuntu.com/security/notices/USN-7073-2
- https://ubuntu.com/security/notices/USN-7076-1
- https://ubuntu.com/security/notices/USN-7076-2
- https://ubuntu.com/security/notices/USN-7110-1
- https://ubuntu.com/security/notices/USN-7119-1
- https://www.cve.org/CVERecord?id=CVE-2024-38630