{"api_version":"1","generated_at":"2026-05-13T19:56:43+00:00","cve":"CVE-2026-43482","urls":{"html":"https://cve.report/CVE-2026-43482","api":"https://cve.report/api/cve/CVE-2026-43482.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43482","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43482"},"summary":{"title":"sched_ext: Disable preemption between scx_claim_exit() and kicking helper work","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Disable preemption between scx_claim_exit() and kicking helper work\n\nscx_claim_exit() atomically sets exit_kind, which prevents scx_error() from\ntriggering further error handling. After claiming exit, the caller must kick\nthe helper kthread work which initiates bypass mode and teardown.\n\nIf the calling task gets preempted between claiming exit and kicking the\nhelper work, and the BPF scheduler fails to schedule it back (since error\nhandling is now disabled), the helper work is never queued, bypass mode\nnever activates, tasks stop being dispatched, and the system wedges.\n\nDisable preemption across scx_claim_exit() and the subsequent work kicking\nin all callers - scx_disable() and scx_vexit(). Add\nlockdep_assert_preemption_disabled() to scx_claim_exit() to enforce the\nrequirement.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-13 16:16:51","updated_at":"2026-05-13 16:16:51"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/41423912f7ac7494ccd6eef411227b4efce740e0","name":"https://git.kernel.org/stable/c/41423912f7ac7494ccd6eef411227b4efce740e0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/522acaae34aa7e05859260056b39c7c030592a0c","name":"https://git.kernel.org/stable/c/522acaae34aa7e05859260056b39c7c030592a0c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/83236b2e43dba00bee5b82eb5758816b1a674f6a","name":"https://git.kernel.org/stable/c/83236b2e43dba00bee5b82eb5758816b1a674f6a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5131dbec2c10961b34f844bc30b400c3fa0bcc72","name":"https://git.kernel.org/stable/c/5131dbec2c10961b34f844bc30b400c3fa0bcc72","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43482","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43482","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f0e1a0643a59bf1f922fa209cec86a170b784f3f 41423912f7ac7494ccd6eef411227b4efce740e0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f0e1a0643a59bf1f922fa209cec86a170b784f3f 522acaae34aa7e05859260056b39c7c030592a0c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f0e1a0643a59bf1f922fa209cec86a170b784f3f 5131dbec2c10961b34f844bc30b400c3fa0bcc72 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f0e1a0643a59bf1f922fa209cec86a170b784f3f 83236b2e43dba00bee5b82eb5758816b1a674f6a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.78 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.20 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.9 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/sched/ext.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"41423912f7ac7494ccd6eef411227b4efce740e0","status":"affected","version":"f0e1a0643a59bf1f922fa209cec86a170b784f3f","versionType":"git"},{"lessThan":"522acaae34aa7e05859260056b39c7c030592a0c","status":"affected","version":"f0e1a0643a59bf1f922fa209cec86a170b784f3f","versionType":"git"},{"lessThan":"5131dbec2c10961b34f844bc30b400c3fa0bcc72","status":"affected","version":"f0e1a0643a59bf1f922fa209cec86a170b784f3f","versionType":"git"},{"lessThan":"83236b2e43dba00bee5b82eb5758816b1a674f6a","status":"affected","version":"f0e1a0643a59bf1f922fa209cec86a170b784f3f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/sched/ext.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.20","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.9","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Disable preemption between scx_claim_exit() and kicking helper work\n\nscx_claim_exit() atomically sets exit_kind, which prevents scx_error() from\ntriggering further error handling. After claiming exit, the caller must kick\nthe helper kthread work which initiates bypass mode and teardown.\n\nIf the calling task gets preempted between claiming exit and kicking the\nhelper work, and the BPF scheduler fails to schedule it back (since error\nhandling is now disabled), the helper work is never queued, bypass mode\nnever activates, tasks stop being dispatched, and the system wedges.\n\nDisable preemption across scx_claim_exit() and the subsequent work kicking\nin all callers - scx_disable() and scx_vexit(). Add\nlockdep_assert_preemption_disabled() to scx_claim_exit() to enforce the\nrequirement."}],"providerMetadata":{"dateUpdated":"2026-05-13T15:08:29.739Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/41423912f7ac7494ccd6eef411227b4efce740e0"},{"url":"https://git.kernel.org/stable/c/522acaae34aa7e05859260056b39c7c030592a0c"},{"url":"https://git.kernel.org/stable/c/5131dbec2c10961b34f844bc30b400c3fa0bcc72"},{"url":"https://git.kernel.org/stable/c/83236b2e43dba00bee5b82eb5758816b1a674f6a"}],"title":"sched_ext: Disable preemption between scx_claim_exit() and kicking helper work","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43482","datePublished":"2026-05-13T15:08:29.739Z","dateReserved":"2026-05-01T14:12:56.012Z","dateUpdated":"2026-05-13T15:08:29.739Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-13 16:16:51","lastModifiedDate":"2026-05-13 16:16:51","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43482","Ordinal":"1","Title":"sched_ext: Disable preemption between scx_claim_exit() and kicki","CVE":"CVE-2026-43482","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43482","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Disable preemption between scx_claim_exit() and kicking helper work\n\nscx_claim_exit() atomically sets exit_kind, which prevents scx_error() from\ntriggering further error handling. After claiming exit, the caller must kick\nthe helper kthread work which initiates bypass mode and teardown.\n\nIf the calling task gets preempted between claiming exit and kicking the\nhelper work, and the BPF scheduler fails to schedule it back (since error\nhandling is now disabled), the helper work is never queued, bypass mode\nnever activates, tasks stop being dispatched, and the system wedges.\n\nDisable preemption across scx_claim_exit() and the subsequent work kicking\nin all callers - scx_disable() and scx_vexit(). Add\nlockdep_assert_preemption_disabled() to scx_claim_exit() to enforce the\nrequirement.","Type":"Description","Title":"sched_ext: Disable preemption between scx_claim_exit() and kicki"}]}}}