# fat: release buffer head after rebuilding parent

CVE record · `CVE-2026-90318`

- **Identifiers:** `CVE-2026-90318`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:08 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: `f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 5e44b6944e11fd6647f028219ad0be4e85e9acee` (git)
  - affected: `f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before d2a86329152c69a6200c15b2bf618755f8563826` (git)
  - affected: `f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 0f18d712ba9c980e05b7e33a27cde4fe3ed2d393` (git)
  - affected: `f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before e38587d98d1ceac608420052c0cdd901d25878f3` (git)
  - affected: `f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before c6a67aa438179cad40f8ae45469e304338d65c0a` (git)
  - affected: `f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 571ea4263d69df1b48578e4314a828ecd0604755` (git)
  - affected: `f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 7565e44507634514e3e1899d3acad3de43f7a2c1` (git)
  - affected: `f1e6fb0ab451dae8523fbb8c119a653b2730e938 to before 83e98dbf19ab64e8528e101e20f8d50e1aaa68a8` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.10`
  - unaffected: `before 3.10` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 12th percentile, on 13 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90318](https://www.cve.org/CVERecord?id=CVE-2026-90318)
- [NVD: CVE-2026-90318](https://nvd.nist.gov/vuln/detail/CVE-2026-90318)

### References from the CNA

- <https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee>
- <https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826>
- <https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393>
- <https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3>
- <https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a>
- <https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755>
- <https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1>
- <https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8>

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-2026-90318>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-90318/>. Everything for agents: <https://agentprime.io/llms.txt>.