# net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs()

CVE record · `CVE-2026-90135`

- **Identifiers:** `CVE-2026-90135`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `4d92b95ff2f95f13df9bad0b5a25a9f60e72758d to before b0859020cab4ea6101478141aeec1b052ed80bdd` (git)
  - affected: `4d92b95ff2f95f13df9bad0b5a25a9f60e72758d to before 45be87c5195f34c0a51598bc91186f600be5c4c9` (git)
  - affected: `4d92b95ff2f95f13df9bad0b5a25a9f60e72758d to before 2775bf36be7872834a7f8c0a0d9681a1a3e1cd4c` (git)
  - affected: `4d92b95ff2f95f13df9bad0b5a25a9f60e72758d to before 5fe03b5257095e2beef0bc79e1f068fbd09a24c7` (git)
  - affected: `4d92b95ff2f95f13df9bad0b5a25a9f60e72758d to before 63ab05e8f9654aa100d366c0236399fda6ffaab1` (git)
  - affected: `4d92b95ff2f95f13df9bad0b5a25a9f60e72758d to before 0b1c2af8a22c35cb099c735c2f63ea3ba757557d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.17`
  - unaffected: `before 5.17` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel net subsystem, from 5.17 before the fix, does not release a reference tracker when device allocation fails, so reading the ref_tracker debug files can cause a use-after-free crash. The source gives few details on who can trigger this. Upgrade to 6.1.191, 6.6.160, 6.12.110, 6.18.52, or a later release in those series.

Written 12 Nov 2026.

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0021, the 10th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90135](https://www.cve.org/CVERecord?id=CVE-2026-90135)
- [NVD: CVE-2026-90135](https://nvd.nist.gov/vuln/detail/CVE-2026-90135)

### References from the CNA

- <https://git.kernel.org/stable/c/b0859020cab4ea6101478141aeec1b052ed80bdd>
- <https://git.kernel.org/stable/c/45be87c5195f34c0a51598bc91186f600be5c4c9>
- <https://git.kernel.org/stable/c/2775bf36be7872834a7f8c0a0d9681a1a3e1cd4c>
- <https://git.kernel.org/stable/c/5fe03b5257095e2beef0bc79e1f068fbd09a24c7>
- <https://git.kernel.org/stable/c/63ab05e8f9654aa100d366c0236399fda6ffaab1>
- <https://git.kernel.org/stable/c/0b1c2af8a22c35cb099c735c2f63ea3ba757557d>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-90135>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90135/>. Everything for agents: <https://agentprime.io/llms.txt>.