# slip: fix use-after-free in sl_sync()

CVE record · `CVE-2026-81001`

- **Identifiers:** `CVE-2026-81001`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:42 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: `5342b77c4123ba39f911d92a813295fb3bb21f69 to before 045e307ac21fbd735b789d8817b21be4d8ead054` (git)
  - affected: `5342b77c4123ba39f911d92a813295fb3bb21f69 to before 87398cdec8bdf84096a8af4dbccdb04f1972f32c` (git)
  - affected: `5342b77c4123ba39f911d92a813295fb3bb21f69 to before e93ace1f46177a4f7b5a8e5996606cdf77e1e890` (git)
  - affected: `5342b77c4123ba39f911d92a813295fb3bb21f69 to before 70e20456bcbf7f3ae145bb96e5548f827a37c640` (git)
  - affected: `5342b77c4123ba39f911d92a813295fb3bb21f69 to before a235b20972bbd98ca1fb127d6269434edc607f19` (git)
  - affected: `5342b77c4123ba39f911d92a813295fb3bb21f69 to before 486577db807891d0f964fdf13c1640c7f54b0ad1` (git)
  - affected: `5342b77c4123ba39f911d92a813295fb3bb21f69 to before d6f25e5bd777b05880da8673daf74a8419480545` (git)
  - affected: `5342b77c4123ba39f911d92a813295fb3bb21f69 to before 2c4e7c42d77e78ad595dbb9e4b5886b58b45d89d` (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: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-81001](https://www.cve.org/CVERecord?id=CVE-2026-81001)
- [NVD: CVE-2026-81001](https://nvd.nist.gov/vuln/detail/CVE-2026-81001)

### References from the CNA

- <https://git.kernel.org/stable/c/045e307ac21fbd735b789d8817b21be4d8ead054>
- <https://git.kernel.org/stable/c/87398cdec8bdf84096a8af4dbccdb04f1972f32c>
- <https://git.kernel.org/stable/c/e93ace1f46177a4f7b5a8e5996606cdf77e1e890>
- <https://git.kernel.org/stable/c/70e20456bcbf7f3ae145bb96e5548f827a37c640>
- <https://git.kernel.org/stable/c/a235b20972bbd98ca1fb127d6269434edc607f19>
- <https://git.kernel.org/stable/c/486577db807891d0f964fdf13c1640c7f54b0ad1>
- <https://git.kernel.org/stable/c/d6f25e5bd777b05880da8673daf74a8419480545>
- <https://git.kernel.org/stable/c/2c4e7c42d77e78ad595dbb9e4b5886b58b45d89d>

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-2026-81001>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-81001/>. Everything for agents: <https://agentprime.io/llms.txt>.