CVE-2024-44958

MediumCVSS 5.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= c5511d03ec090980732e929c318a7a6374b5550e, < 2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4; >= c5511d03ec090980732e929c318a7a6374b5550e, < 2cf7665efe451e48d27953e6b5bc627d518c902b; >= c5511d03ec090980732e929c318a7a6374b5550e, < 65727331b60197b742089855ac09464c22b96f66; >= c5511d03ec090980732e929c318a7a6374b5550e, < d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab; >= c5511d03ec090980732e929c318a7a6374b5550e, < e22f910a26cc2a3ac9c66b8e935ef2a7dd881117; 01659361c63fdc91c0af239d08cdd211d590a656; a2c094816f894b7a265851fad858e994fa0f78b3; >= 4.14.86, < 4.15; >= 4.19.7, < 4.20
LinuxLinux4.20

References

Timeline

Published
Sep 4, 2024
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2024-44958: Medium severity, CVSS 5.5 | Vulnix