CVE-2026-64375
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/07/2026
Last modified:
27/07/2026
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
proc: protect ptrace_may_access() with exec_update_lock (FD links)<br />
<br />
proc_pid_get_link() and proc_pid_readlink() currently look up the task from<br />
the pid once, then do the ptrace access check on that task, then look up<br />
the task from the pid a second time to do the actual access.<br />
That&#39;s racy in several ways.<br />
<br />
To fix it, pass the task to the ->proc_get_link() handler, and instead of<br />
proc_fd_access_allowed(), introduce a new helper call_proc_get_link() that<br />
looks up and locks the task, does the access check, and calls<br />
->proc_get_link().
Impact
Base Score 3.x
7.80
Severity 3.x
HIGH
References to Advisories, Solutions, and Tools
- 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