CVE-2024-41023
- Source
- https://cve.org/CVERecord?id=CVE-2024-41023
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-41023.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-41023
- Downstream
BELL (1)
CLSA (1)
DEBIAN (1)
ECHO (1)
RLSA (1)
ROOT (3)
SUSE (11)
- Related
- Published
- 2024-07-29T14:31:40Z
- Modified
- 2026-10-08T02:48:33Z
- Summary
- sched/deadline: Fix task_struct reference leak
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
sched/deadline: Fix task_struct reference leak
During the execution of the following stress test with linux-rt:
stress-ng --cyclic 30 --timeout 30 --minimize --quiet
kmemleak frequently reported a memory leak concerning the task_struct:
unreferenced object 0xffff8881305b8000 (size 16136): comm "stress-ng", pid 614, jiffies 4294883961 (age 286.412s) object hex dump (first 32 bytes): 02 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .@.............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ debug hex dump (first 16 bytes): 53 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 S............... backtrace: [<00000000046b6790>] dup_task_struct+0x30/0x540 [<00000000c5ca0f0b>] copy_process+0x3d9/0x50e0 [<00000000ced59777>] kernel_clone+0xb0/0x770 [<00000000a50befdc>] __do_sys_clone+0xb6/0xf0 [<000000001dbf2008>] do_syscall_64+0x5d/0xf0 [<00000000552900ff>] entry_SYSCALL_64_after_hwframe+0x6e/0x76
The issue occurs in start_dl_timer(), which increments the task_struct reference count and sets a timer. The timer callback, dl_task_timer, is supposed to decrement the reference count upon expiration. However, if enqueue_task_dl() is called before the timer expires and cancels it, the reference count is not decremented, leading to the leak.
This patch fixes the reference leak by ensuring the task_struct reference count is properly decremented when the timer is canceled.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41023.json" }- References
-
- https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4
- https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/41xxx/CVE-2024-41023.json
- https://nvd.nist.gov/vuln/detail/CVE-2024-41023
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfeff2e65efd8d84cf831668e182b2ce73c604bbbFixed7a54d31face626f62de415ebe77b43f76c3ffaf4Fixedb58652db66c910c2245f5bee7deca41c12d707b9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4.19.257Fixed4.20
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.4.212Fixed5.5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf0e1c1d8ff908a39dd42e723d08f104505dfa601
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced184c8ab5342450c4ae6fc5d937f9bb06c620dcf1