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High severity7.8NVD Advisory· Published Jul 25, 2026· Updated Oct 19, 2026

CVE-2026-64375

CVE-2026-64375

Description

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().

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Affected products

17

Patches

Vulnerability mechanics

References

10

News mentions

1