# ASoC: hdac_hda: Fix hlink refcount leak on component registration failure

CVE record · `CVE-2026-89944`

- **Identifiers:** `CVE-2026-89944`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:32 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: `6bae5ea9498926440ffc883f3dbceb0adc65e492 to before 1c2625fbdeb17376f76c57b7669e6aa6500a7149` (git)
  - affected: `6bae5ea9498926440ffc883f3dbceb0adc65e492 to before 60b5824ae259ad15f7878e4e763ec31ba4db55f2` (git)
  - affected: `6bae5ea9498926440ffc883f3dbceb0adc65e492 to before 7eef9ae3b4ef782557526dd8ba0c206f028d8c2f` (git)
  - affected: `6bae5ea9498926440ffc883f3dbceb0adc65e492 to before e8ea01a0457080b0cc7c69c430c0ab65d84dc377` (git)
  - affected: `6bae5ea9498926440ffc883f3dbceb0adc65e492 to before cb6b0b1a9d5a61ef841739d42c6211094e9c8e2c` (git)
  - affected: `6bae5ea9498926440ffc883f3dbceb0adc65e492 to before 6ad4892c4f5cb437a928a02f5b7d37d496aa9268` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.20`
  - unaffected: `before 4.20` (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: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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 ASoC hdac_hda driver leaks a reference to an HDA link when component registration fails during probe. The source gives few details on attacker access or impact. Upgrade to a fixed release, such as 6.1.191, 6.6.160, 6.12.110, or 6.18.51, 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 15 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89944](https://www.cve.org/CVERecord?id=CVE-2026-89944)
- [NVD: CVE-2026-89944](https://nvd.nist.gov/vuln/detail/CVE-2026-89944)

### References from the CNA

- <https://git.kernel.org/stable/c/1c2625fbdeb17376f76c57b7669e6aa6500a7149>
- <https://git.kernel.org/stable/c/60b5824ae259ad15f7878e4e763ec31ba4db55f2>
- <https://git.kernel.org/stable/c/7eef9ae3b4ef782557526dd8ba0c206f028d8c2f>
- <https://git.kernel.org/stable/c/e8ea01a0457080b0cc7c69c430c0ab65d84dc377>
- <https://git.kernel.org/stable/c/cb6b0b1a9d5a61ef841739d42c6211094e9c8e2c>
- <https://git.kernel.org/stable/c/6ad4892c4f5cb437a928a02f5b7d37d496aa9268>

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-2026-89944>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89944/>. Everything for agents: <https://agentprime.io/llms.txt>.