{"identifier":"CVE-2026-99244","cve":{"id":"CVE-2026-99244","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.","published":"2026-11-03T12:17:30.710000+00:00","modified":"2026-11-03T20:18:30.743000+00:00","status":"Received","score":null,"severity":"UNSCORED","vector":"","cvss_version":"","affected":[],"weaknesses":[],"references":[{"url":"https://git.kernel.org/stable/c/2c20ace1698d03a23467351be1d281e89b36ade3","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/30b274508c743f243c82904954c4e416d7143d4c","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3d15ac36ce174477efa5365e424dbd47950fd2b9","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5c0985dd3c32fc2bbd0e8beaf13cf52cd97376a2","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/70178691c467c8f9f722765299fd8524c3121a35","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9ab0324f4868eeb20c63f063a1e5bc01d5539212","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f46cd8241d9b83f2279cc0db3e9d3e181b548a59","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"kev":null,"kev_checked":true,"metrics":{},"configurations":[],"source":"nvd","retrieved_at":"2026-11-03T23:31:57.896539+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence.","Fresh EPSS data is unavailable; missing values are not zero."]},"epss":null,"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"git.kernel.org","source_url":"https://git.kernel.org/stable/c/2c20ace1698d03a23467351be1d281e89b36ade3","investigate_url":"https://investigate.aeglixmind.com/#git.kernel.org"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-99244","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-99244","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-99244","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}