# drm/amdgpu/vcn: fix integer overflow in dec_msg buffer count check

CVE record · `CVE-2026-89818`

- **Identifiers:** `CVE-2026-89818`
- **State:** Confirmed
- **Severity:** CVSS 7.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 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: `88411caee8f576d6b5abf6531232fcc0ce756dc5 to before c2340281be4ddacb8c203e2bce59b126d1d6c4c8` (git)
  - affected: `c72a8b4dc6d598e3831ef3abd9c6527dfbf4810e to before 6dceaeceaa7c8396339f3ea34b0110cb912ca61b` (git)
  - affected: `7688143ca62edeecacb3ba0a2cea129dbd262a18 to before 47799e1f893d47d8af231710a61065e3ec8a13e8` (git)
  - affected: `63b51e8a9d54317d31cc3856c1e12407070d5fc2 to before 7e28853c78c20bb8ba4c1dba702430cd05e09f76` (git)
  - affected: `b193019860d61e92da395eae2011f2f6716b182f to before 9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3` (git)
  - affected: `b193019860d61e92da395eae2011f2f6716b182f to before 4d7390530853eb7befda9cc786e4c86e8ad7ac9e` (git)
  - affected: `f55552adb100eb54a6e6dabff4fbdc8679bd3fa0` (git)
  - affected: `82c535eff05490c71153af57de9fe85502fcb5d5` (git)
  - affected: `638d3e0b9eb77aa53fdd60e2b928761d16ba76fa` (git)
  - affected: `870c8738c3774336baedddd0240951d078a703b8` (git)
  - affected: `638e48ee39d0f2af9336f917a6f5d6692dd64d93` (git)
  - affected: `e382e0b81a3e7bd21504fee1d01ae8b08f84d3a7` (git)
  - and 7 more
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `7.1`
  - unaffected: `before 7.1` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 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

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th 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-2026-89818](https://www.cve.org/CVERecord?id=CVE-2026-89818)
- [NVD: CVE-2026-89818](https://nvd.nist.gov/vuln/detail/CVE-2026-89818)

### References from the CNA

- <https://git.kernel.org/stable/c/c2340281be4ddacb8c203e2bce59b126d1d6c4c8>
- <https://git.kernel.org/stable/c/6dceaeceaa7c8396339f3ea34b0110cb912ca61b>
- <https://git.kernel.org/stable/c/47799e1f893d47d8af231710a61065e3ec8a13e8>
- <https://git.kernel.org/stable/c/7e28853c78c20bb8ba4c1dba702430cd05e09f76>
- <https://git.kernel.org/stable/c/9ae19bd60891bea0a7b7504cc8dbfe74570ac3b3>
- <https://git.kernel.org/stable/c/4d7390530853eb7befda9cc786e4c86e8ad7ac9e>

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-2026-89818>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89818/>. Everything for agents: <https://agentprime.io/llms.txt>.