CVE-2026-64371

/// Technical 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

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References