# vxlan: mdb: Fix use-after-free in vxlan_mdb_flush()

CVE record · `CVE-2026-93250`

- **Identifiers:** `CVE-2026-93250`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 15:51 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: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before f8a9b988e7a7bc674e74e8c901794d792c35689e` (git)
  - affected: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before c7dc26d06f90ca11bbd6114f6a62a67d038816c7` (git)
  - affected: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before 3e6b705bc162fc7257645725a7d2cf6c71250318` (git)
  - affected: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before f26400b325bdc2868e40612c4804c82cf8ba6275` (git)
  - affected: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before bc2dc66a6693a78f8c1e6ca2dbebd50f16e2c366` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.4`
  - unaffected: `before 6.4` (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 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 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93250](https://www.cve.org/CVERecord?id=CVE-2026-93250)
- [NVD: CVE-2026-93250](https://nvd.nist.gov/vuln/detail/CVE-2026-93250)

### References from the CNA

- <https://git.kernel.org/stable/c/f8a9b988e7a7bc674e74e8c901794d792c35689e>
- <https://git.kernel.org/stable/c/c7dc26d06f90ca11bbd6114f6a62a67d038816c7>
- <https://git.kernel.org/stable/c/3e6b705bc162fc7257645725a7d2cf6c71250318>
- <https://git.kernel.org/stable/c/f26400b325bdc2868e40612c4804c82cf8ba6275>
- <https://git.kernel.org/stable/c/bc2dc66a6693a78f8c1e6ca2dbebd50f16e2c366>

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-2026-93250>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93250/>. Everything for agents: <https://agentprime.io/llms.txt>.