# ipv6: mcast: use copy-on-write RCU updates in ip6_mc_source()

CVE record · `CVE-2026-98101`

- **Identifiers:** `CVE-2026-98101`
- **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:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 25 Sept 2026, 10:35 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: `882ba1f73c06831f2a21044ebd8864c485ac04f2 to before ac51321d3b2391860a935820ebcf4d8b9bb16a8a` (git)
  - affected: `882ba1f73c06831f2a21044ebd8864c485ac04f2 to before dba00514bf668c26cb4900e9f0da84bf96bf065a` (git)
  - affected: `882ba1f73c06831f2a21044ebd8864c485ac04f2 to before 2c2091e2ee93049fc513ad1e6c99d8b6c809f467` (git)
  - affected: `882ba1f73c06831f2a21044ebd8864c485ac04f2 to before 20db91a052332ef5552bd2f651ffb9db911cf67b` (git)
  - affected: `882ba1f73c06831f2a21044ebd8864c485ac04f2 to before c073d1b070f171d206b19c98d71739a97f15b3f1` (git)
  - affected: `47c75e3923c8d562fea8daf0ccf31546a7bef0ea` (git)
  - affected: `5.10.261 to before 5.11` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.13`
  - unaffected: `before 5.13` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th 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-2026-98101](https://www.cve.org/CVERecord?id=CVE-2026-98101)
- [NVD: CVE-2026-98101](https://nvd.nist.gov/vuln/detail/CVE-2026-98101)

### References from the CNA

- <https://git.kernel.org/stable/c/ac51321d3b2391860a935820ebcf4d8b9bb16a8a>
- <https://git.kernel.org/stable/c/dba00514bf668c26cb4900e9f0da84bf96bf065a>
- <https://git.kernel.org/stable/c/2c2091e2ee93049fc513ad1e6c99d8b6c809f467>
- <https://git.kernel.org/stable/c/20db91a052332ef5552bd2f651ffb9db911cf67b>
- <https://git.kernel.org/stable/c/c073d1b070f171d206b19c98d71739a97f15b3f1>

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-2026-98101>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98101/>. Everything for agents: <https://agentprime.io/llms.txt>.