# net: bridge: mcast: don't truncate the port group walk on teardown

CVE record · `CVE-2026-99117`

- **Identifiers:** `CVE-2026-99117`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Oct 2026
- **Updated:** 31 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:34 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: `b08123684bd55fa6d6ee4b52d4ae3040fadb5aa2 to before be331b23c650de9518f8266b901d8abb9b36af77` (git)
  - affected: `b08123684bd55fa6d6ee4b52d4ae3040fadb5aa2 to before ab836d56ff43f2e7927e88c83cd02c47a98a672e` (git)
  - affected: `b08123684bd55fa6d6ee4b52d4ae3040fadb5aa2 to before 025c25ad73323c7dc5af4ee97fe0a2c0b3c177c8` (git)
  - affected: `b08123684bd55fa6d6ee4b52d4ae3040fadb5aa2 to before b0db9f4ff402becff710ab27dbd9f6fe4850b47e` (git)
  - affected: `b08123684bd55fa6d6ee4b52d4ae3040fadb5aa2 to before e69d4927dacd6ddaff09777a89efc0d3143d3b0d` (git)
  - affected: `b08123684bd55fa6d6ee4b52d4ae3040fadb5aa2 to before 8243d587a081e790ad96e80d48eef44d9f7ef005` (git)
  - affected: `b08123684bd55fa6d6ee4b52d4ae3040fadb5aa2 to before b45e8c24608c992d1e2cea047eb5bcbfa537f86b` (git)
  - affected: `b08123684bd55fa6d6ee4b52d4ae3040fadb5aa2 to before 5a3f7a683aee56e1f15c9d53041f3236767eaae7` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.10`
  - unaffected: `before 5.10` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.161 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.115 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.59 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.13 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 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 28 Oct 2026, 10:34 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-99117)

## Sources

- [CVE List: CVE-2026-99117](https://www.cve.org/CVERecord?id=CVE-2026-99117)
- [NVD: CVE-2026-99117](https://nvd.nist.gov/vuln/detail/CVE-2026-99117)

### References from the CNA

- <https://git.kernel.org/stable/c/be331b23c650de9518f8266b901d8abb9b36af77>
- <https://git.kernel.org/stable/c/ab836d56ff43f2e7927e88c83cd02c47a98a672e>
- <https://git.kernel.org/stable/c/025c25ad73323c7dc5af4ee97fe0a2c0b3c177c8>
- <https://git.kernel.org/stable/c/b0db9f4ff402becff710ab27dbd9f6fe4850b47e>
- <https://git.kernel.org/stable/c/e69d4927dacd6ddaff09777a89efc0d3143d3b0d>
- <https://git.kernel.org/stable/c/8243d587a081e790ad96e80d48eef44d9f7ef005>
- <https://git.kernel.org/stable/c/b45e8c24608c992d1e2cea047eb5bcbfa537f86b>
- <https://git.kernel.org/stable/c/5a3f7a683aee56e1f15c9d53041f3236767eaae7>

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-2026-99117>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99117/>. Everything for agents: <https://agentprime.io/llms.txt>.