{"id":"CVE-2026-64371","state":"PUBLISHED","title":"proc: protect ptrace_may_access() with exec_update_lock (part 1)","description":"In 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","publishedAt":"2026-07-25T08:50:23.981Z","updatedAt":"2026-10-15T01:23:38.736Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"ae1e630bcaac739f625822078edbaea98366930d","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"d54f14655fd7d7b293698a8b6918563c4c0465e7","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"7456ae990a9738962b33146916fabca62ae3d4e0","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"4bfe8c481846cee52473a2f7d7b30ee8e6749fc4","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"f9b4b03ccc9c69bf7f7298d4559906ebea7143b3","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"c1cfd63326f5d09999134e9052c353faf738286e","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"6650527444dadc63d84aa939d14ecba4fadb2f69","versionType":"git"},{"version":"6b06d6282100dd5aacf7d45443d651a1995bd9c4","status":"affected","versionType":"git"},{"version":"334ed22054b2ec8477e4409e214fc139cf937ef6","status":"affected","versionType":"git"},{"version":"2.6.27.23","status":"affected","lessThan":"2.6.28","versionType":"semver"},{"version":"2.6.29.3","status":"affected","lessThan":"2.6.30","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/proc/array.c","fs/proc/base.c","fs/proc/namespaces.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.30","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.30","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/proc/array.c","fs/proc/base.c","fs/proc/namespaces.c"]}],"references":["https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d","https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7","https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9","https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0","https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4","https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3","https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e","https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69","https://cert-portal.siemens.com/productcert/html/ssa-019113.html","https://cert-portal.siemens.com/productcert/html/ssa-457936.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64371.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64371","state":"PUBLISHED","datePublished":"2026-07-25T08:50:23.981Z","dateUpdated":"2026-10-15T01:23:38.736Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.783Z"},"containers":{"cna":{"title":"proc: protect ptrace_may_access() with exec_update_lock (part 1)","descriptions":[{"lang":"en","value":"In 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"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"ae1e630bcaac739f625822078edbaea98366930d","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"d54f14655fd7d7b293698a8b6918563c4c0465e7","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"7456ae990a9738962b33146916fabca62ae3d4e0","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"4bfe8c481846cee52473a2f7d7b30ee8e6749fc4","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"f9b4b03ccc9c69bf7f7298d4559906ebea7143b3","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"c1cfd63326f5d09999134e9052c353faf738286e","versionType":"git"},{"version":"f83ce3e6b02d5e48b3a43b001390e2b58820389d","status":"affected","lessThan":"6650527444dadc63d84aa939d14ecba4fadb2f69","versionType":"git"},{"version":"6b06d6282100dd5aacf7d45443d651a1995bd9c4","status":"affected","versionType":"git"},{"version":"334ed22054b2ec8477e4409e214fc139cf937ef6","status":"affected","versionType":"git"},{"version":"2.6.27.23","status":"affected","lessThan":"2.6.28","versionType":"semver"},{"version":"2.6.29.3","status":"affected","lessThan":"2.6.30","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/proc/array.c","fs/proc/base.c","fs/proc/namespaces.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.30","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.30","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/proc/array.c","fs/proc/base.c","fs/proc/namespaces.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d"},{"url":"https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7"},{"url":"https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9"},{"url":"https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0"},{"url":"https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4"},{"url":"https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3"},{"url":"https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e"},{"url":"https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:54:21.091Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","status":"affected","lessThan":"*","versionType":"custom"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.7","status":"affected","lessThan":"*","versionType":"custom"}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}],"providerMetadata":{"shortName":"siemens-SADP","orgId":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","dateUpdated":"2026-10-15T01:23:38.736Z"},"x_adpType":"supplier"}]}}}