{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99249","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.403Z","datePublished":"2026-11-03T11:18:26.800Z","dateUpdated":"2026-11-03T11:18:26.800Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-11-03T11:18:26.800Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npid_namespace: make zap_pid_ns_processes() freezable\n\nWhen the init of a pid namespace exits, zap_pid_ns_processes() waits\nuntil all other pids in the namespace are freed. A tracer outside the\nnamespace that does not reap its traced zombies keeps those pids\nallocated, so this wait has no upper bound, and while it lasts every\nsuspend attempt fails:\n\n  Freezing user space processes failed after 20.006 seconds (2 tasks refusing to freeze, wq_busy=0):\n\nNeither wait is freezable. The first loop sleeps in do_wait(), which\nreturns -ERESTARTSYS on the freezer's fake signal; the loop then clears\nTIF_SIGPENDING and waits again without ever freezing. The final loop\nsleeps in TASK_INTERRUPTIBLE, and since nothing clears TIF_SIGPENDING\nthere, schedule() returns immediately after the first freeze attempt\nand the task spins until the wait ends.\n\nSleep in TASK_INTERRUPTIBLE | TASK_FREEZABLE in do_wait(), so that the\nfreezer can freeze tasks waiting there directly, and in TASK_IDLE |\nTASK_FREEZABLE in the final loop, like coredump_task_exit() does.\n\nThis was hit with Chromium-based browsers: crashpad ptrace-attaches the\nthreads of a crashed renderer, which is a pid namespace init, and does\nnot reap those killed during the dump."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/exit.c","kernel/pid_namespace.c"],"versions":[{"version":"3eb07c8c8adb6f0572baba844ba2d9e501654316","lessThan":"064a6761d6f6ac55d090d3eaca649577ee736713","status":"affected","versionType":"git"},{"version":"3eb07c8c8adb6f0572baba844ba2d9e501654316","lessThan":"e8dafad7de9ede813af2d48cc04b7c88fef16682","status":"affected","versionType":"git"},{"version":"3eb07c8c8adb6f0572baba844ba2d9e501654316","lessThan":"4b47107f1a80c809c80093e872bcaccdbae13db4","status":"affected","versionType":"git"},{"version":"3eb07c8c8adb6f0572baba844ba2d9e501654316","lessThan":"2e10b8a74f55b5aae33db105d3e2d3ae759c865a","status":"affected","versionType":"git"},{"version":"3eb07c8c8adb6f0572baba844ba2d9e501654316","lessThan":"7deb5770840339fe88755bf27b92f74edc26ee87","status":"affected","versionType":"git"},{"version":"3eb07c8c8adb6f0572baba844ba2d9e501654316","lessThan":"81933038f5e273d17ed22792f906889393b204c5","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/exit.c","kernel/pid_namespace.c"],"versions":[{"version":"2.6.24","status":"affected"},{"version":"0","lessThan":"2.6.24","status":"unaffected","versionType":"semver"},{"version":"6.1.191","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.161","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.115","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.59","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.13","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"6.6.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"6.12.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"6.18.59"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"7.2.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.24","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/064a6761d6f6ac55d090d3eaca649577ee736713"},{"url":"https://git.kernel.org/stable/c/e8dafad7de9ede813af2d48cc04b7c88fef16682"},{"url":"https://git.kernel.org/stable/c/4b47107f1a80c809c80093e872bcaccdbae13db4"},{"url":"https://git.kernel.org/stable/c/2e10b8a74f55b5aae33db105d3e2d3ae759c865a"},{"url":"https://git.kernel.org/stable/c/7deb5770840339fe88755bf27b92f74edc26ee87"},{"url":"https://git.kernel.org/stable/c/81933038f5e273d17ed22792f906889393b204c5"}],"title":"pid_namespace: make zap_pid_ns_processes() freezable","x_generator":{"engine":"bippy-1.2.0"}}}}