# ipv6: mcast: use rcu_assign_pointer() for \_\_rcu list updates

CVE record · `CVE-2026-98099`

- **Identifiers:** `CVE-2026-98099`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 25 Sept 2026
- **Updated:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 25 Sept 2026, 10:24 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: `456b61bca8ee324ab6c18b065e632c9a8c88aa39 to before 0e3e3cec28c4d1bf29948da40b4e9e5d44f7852b` (git)
  - affected: `456b61bca8ee324ab6c18b065e632c9a8c88aa39 to before 49d7e1b456ba2f3ee08b3e264d999c09992cde8e` (git)
  - affected: `456b61bca8ee324ab6c18b065e632c9a8c88aa39 to before afca229b39acc2590976b3e4f6e0fe76cededc60` (git)
  - affected: `456b61bca8ee324ab6c18b065e632c9a8c88aa39 to before 2e46b0c9fcf7e10b64ce1630b925f47918d1f7f6` (git)
  - affected: `456b61bca8ee324ab6c18b065e632c9a8c88aa39 to before 0c8f56c583c3250408367880c98e4d6fbc929315` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.38`
  - unaffected: `before 2.6.38` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0009, the 1st percentile, on 11 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-2026-98099](https://www.cve.org/CVERecord?id=CVE-2026-98099)
- [NVD: CVE-2026-98099](https://nvd.nist.gov/vuln/detail/CVE-2026-98099)

### References from the CNA

- <https://git.kernel.org/stable/c/0e3e3cec28c4d1bf29948da40b4e9e5d44f7852b>
- <https://git.kernel.org/stable/c/49d7e1b456ba2f3ee08b3e264d999c09992cde8e>
- <https://git.kernel.org/stable/c/afca229b39acc2590976b3e4f6e0fe76cededc60>
- <https://git.kernel.org/stable/c/2e46b0c9fcf7e10b64ce1630b925f47918d1f7f6>
- <https://git.kernel.org/stable/c/0c8f56c583c3250408367880c98e4d6fbc929315>

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-2026-98099>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98099/>. Everything for agents: <https://agentprime.io/llms.txt>.