# drm/sysfb: ofdrm: Fix integer overflow in fb_size calculation

CVE record · `CVE-2026-89806`

- **Identifiers:** `CVE-2026-89806`
- **State:** Confirmed
- **Severity:** CVSS 8.4 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:30 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: `c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 to before 0cec951667a624fafaca2695c46042f45851caec` (git)
  - affected: `c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 to before 711fe7949d37656a5586244afee9523b9e5e37e9` (git)
  - affected: `c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 to before ded6ad826fe0fd059333d3a3b3e1742c8e45ff41` (git)
  - affected: `c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 to before d9daf9a6e7a6f82ef338a09386eefc6807100d3f` (git)
  - affected: `c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 to before c6f48e59ece0123f6a11527ad4d89b21c2d65b87` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.2`
  - unaffected: `before 6.2` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 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

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0019, the 8th 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89806](https://www.cve.org/CVERecord?id=CVE-2026-89806)
- [NVD: CVE-2026-89806](https://nvd.nist.gov/vuln/detail/CVE-2026-89806)

### References from the CNA

- <https://git.kernel.org/stable/c/0cec951667a624fafaca2695c46042f45851caec>
- <https://git.kernel.org/stable/c/711fe7949d37656a5586244afee9523b9e5e37e9>
- <https://git.kernel.org/stable/c/ded6ad826fe0fd059333d3a3b3e1742c8e45ff41>
- <https://git.kernel.org/stable/c/d9daf9a6e7a6f82ef338a09386eefc6807100d3f>
- <https://git.kernel.org/stable/c/c6f48e59ece0123f6a11527ad4d89b21c2d65b87>

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-2026-89806>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89806/>. Everything for agents: <https://agentprime.io/llms.txt>.