CVE-2024-41023sched/deadline: Fix task_struct reference leak
- 5.5MediumCVSS base score
- 0.36%Exploitation in 30 daysEPSS · top 70% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 17 days later
· 17 days later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.36% · top 70% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected feff2e65efd8d84cf831668e182b2ce73c604bbb – < 8acaaeb484097f46c93bb6c3f836d1c1c07fcbdc
- affected feff2e65efd8d84cf831668e182b2ce73c604bbb – < f8005214946fd1d9fefdeff19c6ce46d60de2cef
- affected feff2e65efd8d84cf831668e182b2ce73c604bbb – < 7a54d31face626f62de415ebe77b43f76c3ffaf4
- affected feff2e65efd8d84cf831668e182b2ce73c604bbb – < b58652db66c910c2245f5bee7deca41c12d707b9
- affected f0e1c1d8ff908a39dd42e723d08f104505dfa601
- affected 184c8ab5342450c4ae6fc5d937f9bb06c620dcf1
- affected 4.19.257 – < 4.20
- affected 5.4.212 – < 5.5
- affected 5.10
- unaffected < 5.10
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.9.10 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References4
- https://git.kernel.org/stable/c/8acaaeb484097f46c93bb6c3f836d1c1c07fcbdc (opens in a new tab)
- https://git.kernel.org/stable/c/f8005214946fd1d9fefdeff19c6ce46d60de2cef (opens in a new tab)
- https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-39372 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-41023)Record last updated .