# media: cec: Serialize exclusive follower delivery

CVE record · `CVE-2026-89897`

- **Identifiers:** `CVE-2026-89897`
- **State:** Confirmed
- **Severity:** CVSS 7.5 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, 10:31 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: `9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 to before efc829b4b937f98c4467bffe9243f756b7cfbf7f` (git)
  - affected: `9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 to before cac577854826950dda4d53569728b1da6c1425d5` (git)
  - affected: `9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 to before 4b532b271c91790b7ab661cd488a7ad36f5c4f6b` (git)
  - affected: `9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 to before 271e57a936dcdbaecb4b1bd005d9a285bbe60ab4` (git)
  - affected: `9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 to before df941e6851da17fc53c7f6af2bdcc7383d17babc` (git)
  - affected: `9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 to before 5c62095acc2a952099688774513c4a637bcdb2b5` (git)
  - affected: `9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 to before ae614f48712156fb0f55b207338d48d422c58bc0` (git)
  - affected: `9881fe0ca187c213eb3a6a8e78e45ad4d1cec171 to before 1924d0788caa6c66fd320dd4704fae99487fd2c7` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.8`
  - unaffected: `before 4.8` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (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: `6.12.110 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0031, the 23rd 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-2026-89897](https://www.cve.org/CVERecord?id=CVE-2026-89897)
- [NVD: CVE-2026-89897](https://nvd.nist.gov/vuln/detail/CVE-2026-89897)

### References from the CNA

- <https://git.kernel.org/stable/c/efc829b4b937f98c4467bffe9243f756b7cfbf7f>
- <https://git.kernel.org/stable/c/cac577854826950dda4d53569728b1da6c1425d5>
- <https://git.kernel.org/stable/c/4b532b271c91790b7ab661cd488a7ad36f5c4f6b>
- <https://git.kernel.org/stable/c/271e57a936dcdbaecb4b1bd005d9a285bbe60ab4>
- <https://git.kernel.org/stable/c/df941e6851da17fc53c7f6af2bdcc7383d17babc>
- <https://git.kernel.org/stable/c/5c62095acc2a952099688774513c4a637bcdb2b5>
- <https://git.kernel.org/stable/c/ae614f48712156fb0f55b207338d48d422c58bc0>
- <https://git.kernel.org/stable/c/1924d0788caa6c66fd320dd4704fae99487fd2c7>

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-2026-89897>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89897/>. Everything for agents: <https://agentprime.io/llms.txt>.