{"id":"CVE-2025-21694","revision":null,"records":[{"revision":"48dc2d04b4f74db8a4271005f9f516bd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21694","aliases":[],"title":"fs/proc: fix softlockup in __read_vmcore (part 2)","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/proc: fix softlockup in __read_vmcore (part 2)\n\nSince commit 5cbcb62dddf5 (\"fs/proc: fix softlockup in __read_vmcore\") the\nnumber of softlockups in __read_vmcore at kdump time have gone down, but\nthey still happen sometimes.\n\nIn a memory constrained environment like the kdump image, a softlockup is\nnot just a harmless message, but it can interfere with things like RCU\nfreeing memory, causing the crashdump to get stuck.\n\nThe second loop in __read_vmcore has a lot more opportunities for natural\nsleep points, like scheduling out while waiting for a data write to\nhappen, but apparently that is not always enough.\n\nAdd a cond_resched() to the second loop in __read_vmcore to (hopefully)\nget rid of the softlockups.","state":0,"publishedAt":"2025-02-12T13:27:53.763+00:00","modifiedAt":"2026-10-15T01:03:18.737+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/proc/vmcore.c\"\n ],\n \"versions\": [\n {\n \"version\": \"803d5a33d5ffdc2d86dcc0cfa01655a330612cdb\",\n \"lessThan\": \"84c4ed15626574c9ac6c1039ba9c137a77bcc7f2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"70c1835e776c8447c1aca87ddb38cfe764fe756a\",\n \"lessThan\": \"80da29deb88a3a907441fc35bb7bac309f31e713\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e1b160a50c756e0efbea290b9bf5117cb80e8c4b\",\n \"lessThan\": \"649b266606bc413407ce315f710c8ce8a88ee30a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"a373ad833a6bfe4bc6cedcf7e56a99cc6fd9a193\",\n \"lessThan\": \"65c367bd9d4f43513c7f837df5753bea9561b836\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"518fbd644dabb6aedbdd4939c6c9cc1bf651459f\",\n \"lessThan\": \"a5a2ee8144c3897d37403a69118c3e3dc5713958\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5cbcb62dddf5346077feb82b7b0c9254222d3445\",\n \"lessThan\": \"80828540dad0757b6337c6561d49c81038f38d87\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5cbcb62dddf5346077feb82b7b0c9254222d3445\",\n \"lessThan\": \"cbc5dde0a461240046e8a41c43d7c3b76d5db952\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"7bdf1d550ddfcd9ab797087421f77b7aceddc8a7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e8780e8a0e25dc4c3927f611ec8970d26c0c7369\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.4.279\",\n \"lessThan\": \"5.4.290\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.221\",\n \"lessThan\": \"5.10.234\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.162\",\n \"lessThan\": \"5.15.177\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.95\",\n \"lessThan\": \"6.1.127\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.35\",\n \"lessThan\": \"6.6.74\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.19.317\",\n \"lessThan\": \"4.20\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.9.6\",\n \"lessThan\": \"6.10\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\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/proc/vmcore.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.10\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.10\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.290\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.234\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.177\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.127\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.74\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.11\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.13\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/84c4ed15626574c9ac6c1039ba9c137a77bcc7f2","https://git.kernel.org/stable/c/80da29deb88a3a907441fc35bb7bac309f31e713","https://git.kernel.org/stable/c/649b266606bc413407ce315f710c8ce8a88ee30a","https://git.kernel.org/stable/c/65c367bd9d4f43513c7f837df5753bea9561b836","https://git.kernel.org/stable/c/a5a2ee8144c3897d37403a69118c3e3dc5713958","https://git.kernel.org/stable/c/80828540dad0757b6337c6561d49c81038f38d87","https://git.kernel.org/stable/c/cbc5dde0a461240046e8a41c43d7c3b76d5db952"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21694","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21694","identifiers":["CVE-2025-21694"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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