{"id":"CVE-2026-99218","revision":"a92ecabafaa3447c8db21fcf3e1dacac","records":[{"revision":"a92ecabafaa3447c8db21fcf3e1dacac","observedAt":"2026-11-02T17:57:17.012+00:00","statement":{"source":"cve-program","id":"CVE-2026-99218","aliases":[],"title":"coredump: hold RCU while releasing parked threads","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoredump: hold RCU while releasing parked threads\n\ncoredump_finish() releases the parked threads by clearing ->task in\ntheir core_thread entry and calling wake_up_process() on each of them.\nIt does that without holding a reference on the task and without being\ninside rcu.\n\nBut calling wake_up_process(task) without rcu here isn't safe. A parked\nthread doesn't need that wakeup to leave. A spurious wakeup or a\npreemption after the store is enough for the task to go away.\n\nSo if the coredump client is preempted between the store and\nwake_up_process() the thread can exit and be freed in the meantime and\ntry_to_wake_up() takes pi_lock in freed memory.\n\nHold rcu across the loop.","state":0,"publishedAt":"2026-11-02T16:06:31.088+00:00","modifiedAt":"2026-11-02T16:06:31.088+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                        \"fs/coredump.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a94e2d408eaedbd85aae259621d46fafc10479a2\",\n                            \"lessThan\": \"fd0fbe84312fda2fc187428c92c50b7d03a9d24c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a94e2d408eaedbd85aae259621d46fafc10479a2\",\n                            \"lessThan\": \"71146c437bae59e5280f657965dc6d006ee3989b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a94e2d408eaedbd85aae259621d46fafc10479a2\",\n                            \"lessThan\": \"0fce73efee40c65ce26641c5d93942462f9e8307\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a94e2d408eaedbd85aae259621d46fafc10479a2\",\n                            \"lessThan\": \"16e94ed90b1b02398e044d41fd1db34828daa08e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a94e2d408eaedbd85aae259621d46fafc10479a2\",\n                            \"lessThan\": \"a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a94e2d408eaedbd85aae259621d46fafc10479a2\",\n                            \"lessThan\": \"b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573\",\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                        \"fs/coredump.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.27\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.27\",\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\": \"6.18.60\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.14\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3.1\",\n                            \"lessThanOrEqual\": \"7.3.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/fd0fbe84312fda2fc187428c92c50b7d03a9d24c","https://git.kernel.org/stable/c/71146c437bae59e5280f657965dc6d006ee3989b","https://git.kernel.org/stable/c/0fce73efee40c65ce26641c5d93942462f9e8307","https://git.kernel.org/stable/c/16e94ed90b1b02398e044d41fd1db34828daa08e","https://git.kernel.org/stable/c/a0f09ff4c6b93312e565cfe75d76c3a551a3ec4c","https://git.kernel.org/stable/c/b0eca0edddf4c1dbaf6d1f6a8636b4235f5bc573"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99218","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99218","identifiers":["CVE-2026-99218"]},"retained":false,"historicalAffected":[]}],"coverage":[]}