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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EPSS — Exploit Prediction

0.0022

Probability of exploitation

0.13%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/138c692d2b2d63d26f2eb957d0e4fcc5d61f9ff2 https://git.kernel.org/stable/c/497c6bae5167428596575f20af6613ff5671f383 https://git.kernel.org/stable/c/6253dfee5afba536bb54fc6fe6c091c3758fafe1 https://git.kernel.org/stable/c/6255da28d4bb5349fe18e84cb043ccd394eba75d https://git.kernel.org/stable/c/65bf0d2b6e914f1448d6a2fde193dcf60936a651 https://git.kernel.org/stable/c/83b17872e3166c295c599279fc9562ac3840c638 https://git.kernel.org/stable/c/de497d7aa2fae453a7e7c8f7d3e8682e565e3aaf https://git.kernel.org/stable/c/dfd1894cb64cbd8758b461ed713800fe73db4f82

Frequently Asked Questions

What is 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().

How do I check if I'm vulnerable to CVE-2026-64375? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.