In the Linux kernel, the following vulnerability has been resolved:
proc: protect ptracemayaccess() with execupdatelock (FD links)
procpidgetlink() and procpid_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 ->procgetlink() handler, and instead of procfdaccessallowed(), introduce a new helper callprocgetlink() that looks up and locks the task, does the access check, and calls ->procgetlink().
{
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64375.json"
}