CVE-2024-44958sched/smt: Fix unbalance sched_smt_present dec/inc
- 5.5MediumCVSS base score
- 0.21%Exploitation in 30 daysEPSS · top 88% 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/smt: Fix unbalance sched_smt_present dec/inc I got the following warn report while doing stress test: jump label: negative count! WARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0 Call Trace: <TASK> __static_key_slow_dec_cpuslocked+0x16/0x70 sched_cpu_deactivate+0x26e/0x2a0 cpuhp_invoke_callback+0x3ad/0x10d0 cpuhp_thread_fun+0x3f5/0x680 smpboot_thread_fn+0x56d/0x8d0 kthread+0x309/0x400 ret_from_fork+0x41/0x70 ret_from_fork_asm+0x1b/0x30 </TASK> Because when cpuset_cpu_inactive() fails in sched_cpu_deactivate(), the cpu offline failed, but sched_smt_present is decremented before calling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so fix it by incrementing sched_smt_present in the error path.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 21 months later
· 21 months 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)
- 0.21% · top 88% 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 c5511d03ec090980732e929c318a7a6374b5550e – < 2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4
- affected c5511d03ec090980732e929c318a7a6374b5550e – < 2cf7665efe451e48d27953e6b5bc627d518c902b
- affected c5511d03ec090980732e929c318a7a6374b5550e – < 65727331b60197b742089855ac09464c22b96f66
- affected c5511d03ec090980732e929c318a7a6374b5550e – < d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab
- affected c5511d03ec090980732e929c318a7a6374b5550e – < e22f910a26cc2a3ac9c66b8e935ef2a7dd881117
- affected 01659361c63fdc91c0af239d08cdd211d590a656
- affected a2c094816f894b7a265851fad858e994fa0f78b3
- affected 4.14.86 – < 4.15
- affected 4.19.7 – < 4.20
- affected 4.20
- unaffected < 4.20
- unaffected 5.15.165 – ≤ 5.15.*
- unaffected 6.1.105 – ≤ 6.1.*
- unaffected 6.6.46 – ≤ 6.6.*
- unaffected 6.10.5 – ≤ 6.10.*
- unaffected 6.11 – ≤ *
References
References6
- https://git.kernel.org/stable/c/2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4 (opens in a new tab)
- https://git.kernel.org/stable/c/2cf7665efe451e48d27953e6b5bc627d518c902b (opens in a new tab)
- https://git.kernel.org/stable/c/65727331b60197b742089855ac09464c22b96f66 (opens in a new tab)
- https://git.kernel.org/stable/c/d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab (opens in a new tab)
- https://git.kernel.org/stable/c/e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
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-2024-41161 (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-2024-44958)Record last updated .