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the Linux kernel, the following vulnerability has been resolved:\n\nproc: protect ptrace_may_access() with exec_update_lock (part 1)\n\nFix the easy cases where procfs currently calls ptrace_may_access() without\nexec_update_lock protection, where the fix is to simply add the extra lock\nor use mm_access():\n\n - do_task_stat(): grab exec_update_lock\n - proc_pid_wchan(): grab exec_update_lock\n - proc_map_files_lookup(): use mm_access() instead of get_task_mm()\n - proc_map_files_readdir(): use mm_access() instead of get_task_mm()\n - proc_ns_get_link(): grab exec_update_lock\n - proc_ns_readlink(): grab exec_update_lock","epss":{"date":"2026-11-09","percentile":0.02541,"score":0.00129},"exploits":[],"kev":null,"metrics":[{"score":5.5,"severity":"medium","source":"NVD: nvd@nist.gov","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794314950307,"publishedAt":1784969423981,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3"},{"source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":["Third Party Advisory"],"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"},{"source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}],"remediation":[{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. 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Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7"},{"kind":"fix","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3"}],"revision":"7a80b4f289a41d29d57f80a703be220e1a22fdced4935195d8d2bf3e1d8ce9e5","sources":[{"modifiedAt":1794314950307,"name":"CNA: Linux","retrievedAt":1794316730098,"url":"https://www.cve.org/CVERecord?id=CVE-2026-64371"},{"modifiedAt":1793985532587,"name":"NVD","retrievedAt":1793989572589,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64371"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794291521529,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-64371"}],"ssvc":{"assessedAt":1793983048360,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"proc: protect ptrace_may_access() with exec_update_lock (part 1)","updatedAt":1794316730098}