{"id":"CVE-2026-99244","aliases":[],"cve":{"records":[{"id":"CVE-2026-99244","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.403Z","published":"2026-11-03T11:15:14.715Z","modified":"2026-11-03T19:13:09.510Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-11-03T19:13:09.510Z"}],"references":[{"url":"https://git.kernel.org/stable/c/2c20ace1698d03a23467351be1d281e89b36ade3","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/9ab0324f4868eeb20c63f063a1e5bc01d5539212","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/30b274508c743f243c82904954c4e416d7143d4c","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/70178691c467c8f9f722765299fd8524c3121a35","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/3d15ac36ce174477efa5365e424dbd47950fd2b9","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/f46cd8241d9b83f2279cc0db3e9d3e181b548a59","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/5c0985dd3c32fc2bbd0e8beaf13cf52cd97376a2","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.95","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.35","versionEndExcluding":"6.6.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.60"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.2.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.3.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.4-rc1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9.6"}]}]}]}],"prioritization":[]},"title":"pid_namespace: prevent TIF_NOTIFY_SIGNAL from interrupting the reaper","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npid_namespace: prevent TIF_NOTIFY_SIGNAL from interrupting the reaper\n\nSince commit 7fea700e04bd (\"zap_pid_ns_processes: clear\nTIF_NOTIFY_SIGNAL along with TIF_SIGPENDING\") zap_pid_ns_processes()\nclears TIF_NOTIFY_SIGNAL before every kernel_wait4() call. Otherwise\nkernel_wait4() doesn't sleep and returns -ERESTARTSYS if\nsignal_pending() is true and the reaper busy-waits.\n\nBut clearing TIF_NOTIFY_SIGNAL doesn't fix it. It can get raised again.\nFor example, klp_send_signals() sets it raw against any task that hasn't\ntransitioned yet. And it keeps sending it until the livepatch finishes.\n\nThe sleep loop waiting for pid_allocated to drop has the same problem\nand it doesn't even clear anything. So a schedule() in\nTASK_INTERRUPTIBLE returns immediately.\n\nUse a no_notify_signal guard. signal_pending() will ignore\nTIF_NOTIFY_SIGNAL and the pid namespace reaper sleeps until a child\nexits or free_pid() wakes it.","score":null,"severity":"unknown","published":"2026-11-03T11:15:14.715Z","modified":"2026-11-03T19:13:09.510Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"edd2754a62bee8d97b4808a15de024f66a1ddccf","status":"affected","lessThan":"2c20ace1698d03a23467351be1d281e89b36ade3","versionType":"git"},{"version":"3466abafa9f4f81a869da828e52a12f693175ec2","status":"affected","lessThan":"9ab0324f4868eeb20c63f063a1e5bc01d5539212","versionType":"git"},{"version":"7fea700e04bd3f424c2d836e98425782f97b494e","status":"affected","lessThan":"30b274508c743f243c82904954c4e416d7143d4c","versionType":"git"},{"version":"7fea700e04bd3f424c2d836e98425782f97b494e","status":"affected","lessThan":"70178691c467c8f9f722765299fd8524c3121a35","versionType":"git"},{"version":"7fea700e04bd3f424c2d836e98425782f97b494e","status":"affected","lessThan":"3d15ac36ce174477efa5365e424dbd47950fd2b9","versionType":"git"},{"version":"7fea700e04bd3f424c2d836e98425782f97b494e","status":"affected","lessThan":"f46cd8241d9b83f2279cc0db3e9d3e181b548a59","versionType":"git"},{"version":"7fea700e04bd3f424c2d836e98425782f97b494e","status":"affected","lessThan":"5c0985dd3c32fc2bbd0e8beaf13cf52cd97376a2","versionType":"git"},{"version":"82c7acf9a12c9b4e4b0aba531de82b4e39a345c8","status":"affected","versionType":"git"},{"version":"8e69e589f233ca2c9631f5af2b94f95dfc2ba804","status":"affected","versionType":"git"},{"version":"09ab5b424b17cfe633db58bb2f9edbaf9484cf20","status":"affected","versionType":"git"},{"version":"6.1.95","status":"affected","lessThan":"6.1.191","versionType":"semver"},{"version":"6.6.35","status":"affected","lessThan":"6.6.161","versionType":"semver"},{"version":"5.10.221","status":"affected","lessThan":"5.11","versionType":"semver"},{"version":"5.15.162","status":"affected","lessThan":"5.16","versionType":"semver"},{"version":"6.9.6","status":"affected","lessThan":"6.10","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99244"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.161","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.115","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.60","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.14","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3.1","status":"unaffected","lessThanOrEqual":"7.3.*","versionType":"semver"},{"version":"7.4-rc1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99244"}],"remediation":[],"references":["https://git.kernel.org/stable/c/2c20ace1698d03a23467351be1d281e89b36ade3","https://git.kernel.org/stable/c/9ab0324f4868eeb20c63f063a1e5bc01d5539212","https://git.kernel.org/stable/c/30b274508c743f243c82904954c4e416d7143d4c","https://git.kernel.org/stable/c/70178691c467c8f9f722765299fd8524c3121a35","https://git.kernel.org/stable/c/3d15ac36ce174477efa5365e424dbd47950fd2b9","https://git.kernel.org/stable/c/f46cd8241d9b83f2279cc0db3e9d3e181b548a59","https://git.kernel.org/stable/c/5c0985dd3c32fc2bbd0e8beaf13cf52cd97376a2"],"sources":[{"name":"CVE","id":"CVE-2026-99244","modified":"2026-11-03T19:13:09.510Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99244"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-11-03T19:50:59.008Z","kev":{"status":"not-listed","checkedAt":"2026-11-06T21:20:33.816Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-11-03T11:30:39.515Z","attemptedAt":"2026-11-03T11:30:39.515Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-03T11:30:39.005Z","attemptedAt":"2026-11-03T11:30:39.005Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-03T11:30:40.042Z","attemptedAt":"2026-11-03T11:30:40.042Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-03T11:30:39.232Z","attemptedAt":"2026-11-03T11:30:39.232Z"}],"evidence":[],"aiSummary":null}