CVE-2026-93246 octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity
An out-of-bounds read in the octeontx2-af kernel driver can cause a crash or leak memory when debug options are enabled during boot.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93246?
CVE-2026-93246 is a memory corruption vulnerability in Linux, published on 24 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity
rvu_register_interrupts() walks every MSI-X vector and uses strstr() to match "Mbox" or "FLR" in irq_name before pinning those interrupts to CPU 0. irq_name is a per-vector NAME_SIZE buffer, but not every slot is populated before this loop runs. strstr() keeps scanning until it finds a NUL terminator, so an uninitialized slot can trigger a KASAN slab-out-of-bounds read at boot when debug options are enabled.
Use strnstr() with NAME_SIZE to bound the search within each vector's name buffer.
Which versions are affected by CVE-2026-93246?
How do I fix CVE-2026-93246?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-93246 being exploited?
There is no known exploitation of CVE-2026-93246 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-93246, GHSA-52xx-jr85-g6wq, UBUNTU-CVE-2026-93246.