# perf sched: Fix register_pid() overflow, strcpy, and BUG_ON

CVE record · `CVE-2026-80671`

- **Identifiers:** `CVE-2026-80671`
- **State:** Confirmed
- **Severity:** CVSS 9.3 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Aug 2026
- **Updated:** 14 Sept 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Aug 2026, 06:49 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.

## Critical

Critical, because:

- CVSS score 9.3: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `ec156764d424dd67283c2cd5e9f6f1b8388364ac to before 344e59fc4f2cba6dc04ce5e2a77388645d4ca834` (git)
  - affected: `ec156764d424dd67283c2cd5e9f6f1b8388364ac to before 22263d241bad753217d545f8085b7ead52e2873b` (git)
  - affected: `ec156764d424dd67283c2cd5e9f6f1b8388364ac to before 2003918e13f43cf6c5698be3cc9aa3657dd676a8` (git)
  - affected: `ec156764d424dd67283c2cd5e9f6f1b8388364ac to before 29639f00bfa49da7904ba0a499e0da7a0e5d735e` (git)
  - affected: `ec156764d424dd67283c2cd5e9f6f1b8388364ac to before 261d2b5f4afa0570ca906e553c93811c5abe4590` (git)
  - affected: `ec156764d424dd67283c2cd5e9f6f1b8388364ac to before 652cea73b7b7b7c622a2be670e44e3c499c6d49f` (git)
  - affected: `ec156764d424dd67283c2cd5e9f6f1b8388364ac to before 5ea1dcc9418c4e06ce29ed5170596f497ba86872` (git)
  - affected: `ec156764d424dd67283c2cd5e9f6f1b8388364ac to before 5949d339f5ec98752d56dcd4e36f619a59d513a5` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.32`
  - unaffected: `before 2.6.32` (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: `6.18.40 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 4th 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 28 Aug 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80671](https://www.cve.org/CVERecord?id=CVE-2026-80671)
- [NVD: CVE-2026-80671](https://nvd.nist.gov/vuln/detail/CVE-2026-80671)

### References from the CNA

- <https://git.kernel.org/stable/c/344e59fc4f2cba6dc04ce5e2a77388645d4ca834>
- <https://git.kernel.org/stable/c/22263d241bad753217d545f8085b7ead52e2873b>
- <https://git.kernel.org/stable/c/2003918e13f43cf6c5698be3cc9aa3657dd676a8>
- <https://git.kernel.org/stable/c/29639f00bfa49da7904ba0a499e0da7a0e5d735e>
- <https://git.kernel.org/stable/c/261d2b5f4afa0570ca906e553c93811c5abe4590>
- <https://git.kernel.org/stable/c/652cea73b7b7b7c622a2be670e44e3c499c6d49f>
- <https://git.kernel.org/stable/c/5ea1dcc9418c4e06ce29ed5170596f497ba86872>
- <https://git.kernel.org/stable/c/5949d339f5ec98752d56dcd4e36f619a59d513a5>

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-2026-80671>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80671/>. Everything for agents: <https://agentprime.io/llms.txt>.