{"id":"CVE-2026-64375","revision":null,"records":[{"revision":"0da357fcaab64fc9b966820062b65134","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64375","aliases":[],"title":"proc: protect ptrace_may_access() with exec_update_lock (FD links)","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nproc: protect ptrace_may_access() with exec_update_lock (FD links)\n\nproc_pid_get_link() and proc_pid_readlink() currently look up the task from\nthe pid once, then do the ptrace access check on that task, then look up\nthe task from the pid a second time to do the actual access.\nThat's racy in several ways.\n\nTo fix it, pass the task to the ->proc_get_link() handler, and instead of\nproc_fd_access_allowed(), introduce a new helper call_proc_get_link() that\nlooks up and locks the task, does the access check, and calls\n->proc_get_link().","state":0,"publishedAt":"2026-07-25T08:50:26.869+00:00","modifiedAt":"2026-10-19T20:38:25.42+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/base.c\",\n \"fs/proc/fd.c\",\n \"fs/proc/internal.h\"\n ],\n \"versions\": [\n {\n \"version\": \"778c1144771f0064b6f51bee865cceb0d996f2f9\",\n \"lessThan\": \"6253dfee5afba536bb54fc6fe6c091c3758fafe1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"778c1144771f0064b6f51bee865cceb0d996f2f9\",\n \"lessThan\": \"65bf0d2b6e914f1448d6a2fde193dcf60936a651\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"778c1144771f0064b6f51bee865cceb0d996f2f9\",\n \"lessThan\": \"de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"778c1144771f0064b6f51bee865cceb0d996f2f9\",\n \"lessThan\": \"138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"778c1144771f0064b6f51bee865cceb0d996f2f9\",\n \"lessThan\": \"83b17872e3166c295c599279fc9562ac3840c638\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"778c1144771f0064b6f51bee865cceb0d996f2f9\",\n \"lessThan\": \"497c6bae5167428596575f20af6613ff5671f383\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"778c1144771f0064b6f51bee865cceb0d996f2f9\",\n \"lessThan\": \"dfd1894cb64cbd8758b461ed713800fe73db4f82\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"778c1144771f0064b6f51bee865cceb0d996f2f9\",\n \"lessThan\": \"6255da28d4bb5349fe18e84cb043ccd394eba75d\",\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/proc/base.c\",\n \"fs/proc/fd.c\",\n \"fs/proc/internal.h\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.18\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.18\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.261\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.212\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.178\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.145\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.97\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.40\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.4\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1","https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651","https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf","https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2","https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638","https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383","https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82","https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64375","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64375","identifiers":["CVE-2026-64375"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all 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