# ring-buffer: Fix event length with forced 8-byte alignment

CVE record · `CVE-2026-80876`

- **Identifiers:** `CVE-2026-80876`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 4 Sept 2026
- **Updated:** 6 Nov 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 4 Sept 2026, 16:48 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: `2271048d1b3b0aabf83d25b29c20646dcabedc05 to before 7c9f0ccf9f04142458d2ac3d39414f4acae242f0` (git)
  - affected: `2271048d1b3b0aabf83d25b29c20646dcabedc05 to before 24c3fa71f9947b0e1f3b954db1b769b44140192e` (git)
  - affected: `2271048d1b3b0aabf83d25b29c20646dcabedc05 to before 14057268e79654c3e8ea2c9b5204cb9644b2964d` (git)
  - affected: `2271048d1b3b0aabf83d25b29c20646dcabedc05 to before dbcb8635b1eb7603818591cf745c7b1d714f7ac6` (git)
  - affected: `2271048d1b3b0aabf83d25b29c20646dcabedc05 to before cfada73fabe2ccc06ec77fe2ceaa088689213326` (git)
  - affected: `2271048d1b3b0aabf83d25b29c20646dcabedc05 to before ec5e96aee75d27779b9a860307679f13f33adb0c` (git)
  - affected: `2271048d1b3b0aabf83d25b29c20646dcabedc05 to before 3a63a11897c7ba32d1be7a3fdbc48a8b01cf4992` (git)
  - affected: `2271048d1b3b0aabf83d25b29c20646dcabedc05 to before c37e0a4b79a6bbb96ce5ffe279d7c001e20529e0` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.34`
  - unaffected: `before 2.6.34` (semver)
  - unaffected: `5.10.261 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.212 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.178 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.145 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.97 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.40 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.5 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 12th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 4 Sept 2026, 16:48 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-80876)
- 4 Sept 2026, 17:16 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-80876)

## Sources

- [CVE List: CVE-2026-80876](https://www.cve.org/CVERecord?id=CVE-2026-80876)
- [NVD: CVE-2026-80876](https://nvd.nist.gov/vuln/detail/CVE-2026-80876)

### References from the CNA

- <https://git.kernel.org/stable/c/7c9f0ccf9f04142458d2ac3d39414f4acae242f0>
- <https://git.kernel.org/stable/c/24c3fa71f9947b0e1f3b954db1b769b44140192e>
- <https://git.kernel.org/stable/c/14057268e79654c3e8ea2c9b5204cb9644b2964d>
- <https://git.kernel.org/stable/c/dbcb8635b1eb7603818591cf745c7b1d714f7ac6>
- <https://git.kernel.org/stable/c/cfada73fabe2ccc06ec77fe2ceaa088689213326>
- <https://git.kernel.org/stable/c/ec5e96aee75d27779b9a860307679f13f33adb0c>
- <https://git.kernel.org/stable/c/3a63a11897c7ba32d1be7a3fdbc48a8b01cf4992>
- <https://git.kernel.org/stable/c/c37e0a4b79a6bbb96ce5ffe279d7c001e20529e0>

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-2026-80876>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80876/>. Everything for agents: <https://agentprime.io/llms.txt>.