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

CVE record · `CVE-2026-98122`

- **Identifiers:** `CVE-2026-98122`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 25 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 25 Sept 2026, 10:36 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 069d5527bb0f229e528fa88c6b72f15060c373f2` (git)
  - affected: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before e12c903fd13c6261b98ca18d8f70ac26e739e2f8` (git)
  - affected: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before 74e2a56c82209b0335b53e25f19f9b0590e2483d` (git)
  - affected: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before 71203a41d6fa2fa0ea2f3a7541987958bd3694fd` (git)
  - affected: `a3a48de5eade770e911d35291217bdd69ce04ef1 to before 4aa61c88b4e292e10abdfd791334b8272108d68a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.4`
  - unaffected: `before 6.4` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.7 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:** 0.0013, the 2nd percentile, on 12 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 25 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98122](https://www.cve.org/CVERecord?id=CVE-2026-98122)
- [NVD: CVE-2026-98122](https://nvd.nist.gov/vuln/detail/CVE-2026-98122)

### References from the CNA

- <https://git.kernel.org/stable/c/069d5527bb0f229e528fa88c6b72f15060c373f2>
- <https://git.kernel.org/stable/c/e12c903fd13c6261b98ca18d8f70ac26e739e2f8>
- <https://git.kernel.org/stable/c/74e2a56c82209b0335b53e25f19f9b0590e2483d>
- <https://git.kernel.org/stable/c/71203a41d6fa2fa0ea2f3a7541987958bd3694fd>
- <https://git.kernel.org/stable/c/4aa61c88b4e292e10abdfd791334b8272108d68a>

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-2026-98122>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98122/>. Everything for agents: <https://agentprime.io/llms.txt>.