{"id":"CVE-2024-44958","state":"PUBLISHED","title":"sched/smt: Fix unbalance sched_smt_present dec/inc","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched/smt: Fix unbalance sched_smt_present dec/inc\n\nI got the following warn report while doing stress test:\n\njump label: negative count!\nWARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0\nCall Trace:\n <TASK>\n __static_key_slow_dec_cpuslocked+0x16/0x70\n sched_cpu_deactivate+0x26e/0x2a0\n cpuhp_invoke_callback+0x3ad/0x10d0\n cpuhp_thread_fun+0x3f5/0x680\n smpboot_thread_fn+0x56d/0x8d0\n kthread+0x309/0x400\n ret_from_fork+0x41/0x70\n ret_from_fork_asm+0x1b/0x30\n </TASK>\n\nBecause when cpuset_cpu_inactive() fails in sched_cpu_deactivate(),\nthe cpu offline failed, but sched_smt_present is decremented before\ncalling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so\nfix it by incrementing sched_smt_present in the error path.","publishedAt":"2024-09-04T18:35:56.655Z","updatedAt":"2026-05-23T15:53:13.501Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4","versionType":"git"},{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"2cf7665efe451e48d27953e6b5bc627d518c902b","versionType":"git"},{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"65727331b60197b742089855ac09464c22b96f66","versionType":"git"},{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab","versionType":"git"},{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"e22f910a26cc2a3ac9c66b8e935ef2a7dd881117","versionType":"git"},{"version":"01659361c63fdc91c0af239d08cdd211d590a656","status":"affected","versionType":"git"},{"version":"a2c094816f894b7a265851fad858e994fa0f78b3","status":"affected","versionType":"git"},{"version":"4.14.86","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.7","status":"affected","lessThan":"4.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/sched/core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"5.15.165","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.105","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.46","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.5","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/sched/core.c"]}],"references":["https://git.kernel.org/stable/c/2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4","https://git.kernel.org/stable/c/2cf7665efe451e48d27953e6b5bc627d518c902b","https://git.kernel.org/stable/c/65727331b60197b742089855ac09464c22b96f66","https://git.kernel.org/stable/c/d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab","https://git.kernel.org/stable/c/e22f910a26cc2a3ac9c66b8e935ef2a7dd881117","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:47.831Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/44xxx/CVE-2024-44958.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-44958","state":"PUBLISHED","datePublished":"2024-09-04T18:35:56.655Z","dateUpdated":"2026-05-23T15:53:13.501Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-21T05:34:56.666Z"},"containers":{"cna":{"title":"sched/smt: Fix unbalance sched_smt_present dec/inc","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched/smt: Fix unbalance sched_smt_present dec/inc\n\nI got the following warn report while doing stress test:\n\njump label: negative count!\nWARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0\nCall Trace:\n <TASK>\n __static_key_slow_dec_cpuslocked+0x16/0x70\n sched_cpu_deactivate+0x26e/0x2a0\n cpuhp_invoke_callback+0x3ad/0x10d0\n cpuhp_thread_fun+0x3f5/0x680\n smpboot_thread_fn+0x56d/0x8d0\n kthread+0x309/0x400\n ret_from_fork+0x41/0x70\n ret_from_fork_asm+0x1b/0x30\n </TASK>\n\nBecause when cpuset_cpu_inactive() fails in sched_cpu_deactivate(),\nthe cpu offline failed, but sched_smt_present is decremented before\ncalling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so\nfix it by incrementing sched_smt_present in the error path."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4","versionType":"git"},{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"2cf7665efe451e48d27953e6b5bc627d518c902b","versionType":"git"},{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"65727331b60197b742089855ac09464c22b96f66","versionType":"git"},{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab","versionType":"git"},{"version":"c5511d03ec090980732e929c318a7a6374b5550e","status":"affected","lessThan":"e22f910a26cc2a3ac9c66b8e935ef2a7dd881117","versionType":"git"},{"version":"01659361c63fdc91c0af239d08cdd211d590a656","status":"affected","versionType":"git"},{"version":"a2c094816f894b7a265851fad858e994fa0f78b3","status":"affected","versionType":"git"},{"version":"4.14.86","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.7","status":"affected","lessThan":"4.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/sched/core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"5.15.165","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.105","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.46","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.5","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/sched/core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4"},{"url":"https://git.kernel.org/stable/c/2cf7665efe451e48d27953e6b5bc627d518c902b"},{"url":"https://git.kernel.org/stable/c/65727331b60197b742089855ac09464c22b96f66"},{"url":"https://git.kernel.org/stable/c/d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab"},{"url":"https://git.kernel.org/stable/c/e22f910a26cc2a3ac9c66b8e935ef2a7dd881117"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:53:13.501Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.15.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.105"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.6.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.10.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.7"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-44958","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T17:39:57.304687Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-12T17:33:36.235Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T22:14:05.622Z"}}]}}}