Threats Tagged 'cve-2026-64375'

A race condition vulnerability in the Linux kernel's proc filesystem was resolved by protecting the ptrace_may_access() function with the exec_update_lock. The issue involved multiple lookups of the task from the pid during ptrace access checks, which could lead to inconsistent or unauthorized access. The fix involves changing the task lookup and locking mechanism to ensure proper synchronization during access checks.

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().