# gtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free

CVE record · `CVE-2026-89789`

- **Identifiers:** `CVE-2026-89789`
- **State:** Confirmed
- **Severity:** CVSS 7.8 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, 08:48 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: `459aa660eb1d8ce67080da1983bb81d716aa5a69 to before fcafb2b1430824bae4258c01a439ec97ca0c6973` (git)
  - affected: `459aa660eb1d8ce67080da1983bb81d716aa5a69 to before 3ca3da5c305caa873ddb81e8c6b118143f6dd3d1` (git)
  - affected: `459aa660eb1d8ce67080da1983bb81d716aa5a69 to before 6f815c2fb6ab20385f81c353cdad0ea3b88132af` (git)
  - affected: `459aa660eb1d8ce67080da1983bb81d716aa5a69 to before e3b9aa0773abd5d4ed90be41ce5306c146d5b09e` (git)
  - affected: `459aa660eb1d8ce67080da1983bb81d716aa5a69 to before fd8396cfecbd904468c71362f08aaa25f96d5337` (git)
  - affected: `459aa660eb1d8ce67080da1983bb81d716aa5a69 to before 7677eb2cbf2cc7446de474c01a6b06277c0051e5` (git)
  - affected: `459aa660eb1d8ce67080da1983bb81d716aa5a69 to before 8d85498016a5bb56339734a14c276209fa65bafc` (git)
  - affected: `459aa660eb1d8ce67080da1983bb81d716aa5a69 to before d989e22ae9802c52c56ad4284d0caf26696cf6ae` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.7`
  - unaffected: `before 4.7` (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: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89789](https://www.cve.org/CVERecord?id=CVE-2026-89789)
- [NVD: CVE-2026-89789](https://nvd.nist.gov/vuln/detail/CVE-2026-89789)

### References from the CNA

- <https://git.kernel.org/stable/c/fcafb2b1430824bae4258c01a439ec97ca0c6973>
- <https://git.kernel.org/stable/c/3ca3da5c305caa873ddb81e8c6b118143f6dd3d1>
- <https://git.kernel.org/stable/c/6f815c2fb6ab20385f81c353cdad0ea3b88132af>
- <https://git.kernel.org/stable/c/e3b9aa0773abd5d4ed90be41ce5306c146d5b09e>
- <https://git.kernel.org/stable/c/fd8396cfecbd904468c71362f08aaa25f96d5337>
- <https://git.kernel.org/stable/c/7677eb2cbf2cc7446de474c01a6b06277c0051e5>
- <https://git.kernel.org/stable/c/8d85498016a5bb56339734a14c276209fa65bafc>
- <https://git.kernel.org/stable/c/d989e22ae9802c52c56ad4284d0caf26696cf6ae>

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-2026-89789>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89789/>. Everything for agents: <https://agentprime.io/llms.txt>.