CVE-2026-64375
In the Linux kernel, the following vulnerability has been resolved: proc: protect ptrace_may_access() with exec_update_lock (FD links) proc_pid_get_link() and proc_pid_readlink() currently look up the task from the pid once, then do the ptrace access check on that task, then look up the task from the pid a second time to do the actual access. That's racy in several ways. To fix it, pass the task to the ->proc_get_link() handler, and instead of proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that looks up and locks the task, does the access check, and calls ->proc_get_link().
Affected versions
Linux kernel versions
2.6.18
and later are affected. Fixed in
5.10.261,
5.15.212,
6.1.178,
6.6.145,
6.12.97,
6.18.40,
7.1.4,
7.2-rc1
and their respective stable series.
References
8 totalFrequently asked questions
-
What is CVE-2026-64375?
CVE-2026-64375 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.18 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-64375 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-64375?
Yes. CVE-2026-64375 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 2.6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-64375 actively exploited?
No. CVE-2026-64375 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.