CVE-2026-99232tracing/syscalls: Use copy_from_user for the faultable syscall buffer

Beschreibung

In the Linux kernel, the following vulnerability has been resolved: tracing/syscalls: Use copy_from_user for the faultable syscall buffer syscall_copy_user_array() copies the buffer argument of faultable syscalls (write, pwrite64, ...) with __copy_from_user(), which skips access_ok(). Use copy_from_user() instead so a non-user address is rejected and the entry is recorded as faulted. It could be a security concern for machines that trust perf a bit too much.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://git.kernel.org/stable/c/e33e2718c62a602001ab549642a1aed0be797105
• https://git.kernel.org/stable/c/041d1a568a11a7ed7415ef1408d0c65041c1ad69
• https://git.kernel.org/stable/c/097fd0050089df17b032f2b852b9b65e548e342a