# auxdisplay: charlcd: cancel backlight work on registration failure

CVE record · `CVE-2026-89585`

- **Identifiers:** `CVE-2026-89585`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:44 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: `39f8ea46724efbed3ca021863a22337c31be264c to before cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04` (git)
  - affected: `39f8ea46724efbed3ca021863a22337c31be264c to before 22586432c1aba89d9bd33f3173408dac830f220b` (git)
  - affected: `39f8ea46724efbed3ca021863a22337c31be264c to before 6eaed64a32e550daf0dc9549742b3ab9e41d984f` (git)
  - affected: `39f8ea46724efbed3ca021863a22337c31be264c to before fe7ba73dde94c5f413b1588cd444b49105015dda` (git)
  - affected: `39f8ea46724efbed3ca021863a22337c31be264c to before 84858671842ae5857b9ed1202b62f9045373dcd1` (git)
  - affected: `39f8ea46724efbed3ca021863a22337c31be264c to before ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755` (git)
  - affected: `39f8ea46724efbed3ca021863a22337c31be264c to before e3e3bf40916c1e810df03958cfa7ba6883cdce79` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.12`
  - unaffected: `before 4.12` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th percentile, on 14 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89585](https://www.cve.org/CVERecord?id=CVE-2026-89585)
- [NVD: CVE-2026-89585](https://nvd.nist.gov/vuln/detail/CVE-2026-89585)

### References from the CNA

- <https://git.kernel.org/stable/c/cd97b3c68fe3c06c8067cc59d7dff976c5b7ea04>
- <https://git.kernel.org/stable/c/22586432c1aba89d9bd33f3173408dac830f220b>
- <https://git.kernel.org/stable/c/6eaed64a32e550daf0dc9549742b3ab9e41d984f>
- <https://git.kernel.org/stable/c/fe7ba73dde94c5f413b1588cd444b49105015dda>
- <https://git.kernel.org/stable/c/84858671842ae5857b9ed1202b62f9045373dcd1>
- <https://git.kernel.org/stable/c/ff2fb3c1e60cb247ea3e28c0ea0bea81c18f7755>
- <https://git.kernel.org/stable/c/e3e3bf40916c1e810df03958cfa7ba6883cdce79>

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-2026-89585>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89585/>. Everything for agents: <https://agentprime.io/llms.txt>.