CVE-2026-93246
UnknownSummary
In the octeontx2-af driver, there is an out-of-bounds read vulnerability when setting MSI-X IRQ affinity. The strstr() function may read beyond the buffer when the field is uninitialized, potentially triggering a KASAN error.
Risk Assessment
The vulnerability may lead to information disclosure from kernel memory or system crashes during boot. It requires debug options enabled, but poses a real risk to stability.
Recommendation
It is recommended to update the Linux kernel to a version containing the fix that uses strnstr() with length limit. Also consider disabling debug options in production environments.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS