{"id":"CVE-2026-99249","revision":"421b7d7f42ec4be89b99ac800c81c769","records":[{"revision":"421b7d7f42ec4be89b99ac800c81c769","observedAt":"2026-11-03T12:57:16.958+00:00","statement":{"source":"cve-program","id":"CVE-2026-99249","aliases":[],"title":"pid_namespace: make zap_pid_ns_processes() freezable","description":"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.","state":0,"publishedAt":"2026-11-03T11:18:26.8+00:00","modifiedAt":"2026-11-03T11:18:26.8+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/exit.c\",\n                        \"kernel/pid_namespace.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3eb07c8c8adb6f0572baba844ba2d9e501654316\",\n                            \"lessThan\": \"064a6761d6f6ac55d090d3eaca649577ee736713\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3eb07c8c8adb6f0572baba844ba2d9e501654316\",\n                            \"lessThan\": \"e8dafad7de9ede813af2d48cc04b7c88fef16682\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3eb07c8c8adb6f0572baba844ba2d9e501654316\",\n                            \"lessThan\": \"4b47107f1a80c809c80093e872bcaccdbae13db4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3eb07c8c8adb6f0572baba844ba2d9e501654316\",\n                            \"lessThan\": \"2e10b8a74f55b5aae33db105d3e2d3ae759c865a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3eb07c8c8adb6f0572baba844ba2d9e501654316\",\n                            \"lessThan\": \"7deb5770840339fe88755bf27b92f74edc26ee87\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3eb07c8c8adb6f0572baba844ba2d9e501654316\",\n                            \"lessThan\": \"81933038f5e273d17ed22792f906889393b204c5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/exit.c\",\n                        \"kernel/pid_namespace.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.24\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.24\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.191\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.161\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.115\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.59\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.13\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/064a6761d6f6ac55d090d3eaca649577ee736713","https://git.kernel.org/stable/c/e8dafad7de9ede813af2d48cc04b7c88fef16682","https://git.kernel.org/stable/c/4b47107f1a80c809c80093e872bcaccdbae13db4","https://git.kernel.org/stable/c/2e10b8a74f55b5aae33db105d3e2d3ae759c865a","https://git.kernel.org/stable/c/7deb5770840339fe88755bf27b92f74edc26ee87","https://git.kernel.org/stable/c/81933038f5e273d17ed22792f906889393b204c5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99249","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99249","identifiers":["CVE-2026-99249"]},"retained":false,"historicalAffected":[]}],"coverage":[]}