{"id":"CVE-2026-64371","title":"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 protectio…","summary":"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 protectio…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 2.6.27.23, < 2.6.28","linux_kernel >= 2.6.29.3, < 2.6.30","linux_kernel >= 2.6.30.1, < 5.10.261","linux_kernel >= 5.11, < 5.15.212","linux_kernel >= 5.16, < 6.1.178","linux_kernel >= 6.2, < 6.6.145","linux_kernel >= 6.7, < 6.12.97","linux_kernel >= 6.13, < 6.18.40","linux_kernel >= 6.19, < 7.1.4","linux_kernel = 2.6.30"],"patched":["linux_kernel 7.1.4"],"published":"2026-07-25","updated":"2026-09-08","sourceUpdated":"2026-09-08T15:23:41.413","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64371","references":[{"url":"https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64371.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-64371"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507148"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64371"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64371"},{"url":"https://lore.kernel.org/linux-cve-announce/2026072523-CVE-2026-64371-d1c5@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00125,"epssPercentile":0.02568,"ingestedAt":"2026-09-08T15:33:26.948Z","scores":{"nvd":5.5,"vendor":7},"slug":"CVE-2026-64371","body":"## Overview\n\nIn 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\n\n## Affected\n\n- `linux_kernel >= 2.6.27.23, < 2.6.28`\n- `linux_kernel >= 2.6.29.3, < 2.6.30`\n- `linux_kernel >= 2.6.30.1, < 5.10.261`\n- `linux_kernel >= 5.11, < 5.15.212`\n- `linux_kernel >= 5.16, < 6.1.178`\n- `linux_kernel >= 6.2, < 6.6.145`\n- `linux_kernel >= 6.7, < 6.12.97`\n- `linux_kernel >= 6.13, < 6.18.40`\n- `linux_kernel >= 6.19, < 7.1.4`\n- `linux_kernel = 2.6.30`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.1.4`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64371.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}