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Vulnerability record · CVE-2026-64371 · published 25 July 2026

CVE-2026-64371: Linux kernel vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (part 1) Fix the easy cases where procfs currently calls ptrace_may_access() without exec_update_lock protection, where the fix is to simply add the extra lock or use mm_access(): - do_task_stat(): grab exec_update_lock - proc_pid_wchan(): grab exec_update_lock - proc_map_files_lookup(): use mm_access() instead of get_task_mm() - proc_map_files_readdir(): use mm_access() instead of get_task_mm() - proc_ns_get_link(): grab exec_update_lock - proc_ns_readlink(): grab exec_update_lock

5.5 CVSS 3.1 Medium EPSS 0.13% · top 98.1%
5.5CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References
8 Sep 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (part 1) Fix the easy cases where procfs currently calls ptrace_may_access() without exec_update_lock protection, where the fix is to simply add the extra lock or use mm_access(): - do_task_stat(): grab exec_update_lock - proc_pid_wchan(): grab exec_update_lock - proc_map_files_lookup(): use mm_access() instead of get_task_mm() - proc_map_files_readdir(): use mm_access() instead of get_task_mm() - proc_ns_get_link(): grab exec_update_lock - proc_ns_readlink(): grab exec_update_lock

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/4bfe8c481846cee52473a2f7d7b30ee8e6749fc4 Patch
https://git.kernel.org/stable/c/6650527444dadc63d84aa939d14ecba4fadb2f69 Patch
https://git.kernel.org/stable/c/7456ae990a9738962b33146916fabca62ae3d4e0 Patch
https://git.kernel.org/stable/c/ae1e630bcaac739f625822078edbaea98366930d Patch
https://git.kernel.org/stable/c/bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9 Patch
https://git.kernel.org/stable/c/c1cfd63326f5d09999134e9052c353faf738286e Patch
https://git.kernel.org/stable/c/d54f14655fd7d7b293698a8b6918563c4c0465e7 Patch
https://git.kernel.org/stable/c/f9b4b03ccc9c69bf7f7298d4559906ebea7143b3 Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-64371), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.