# ipv6: do not let ipv6_find_hdr() return an offset past the packet end

CVE record · `CVE-2026-98532`

- **Identifiers:** `CVE-2026-98532`
- **State:** Confirmed
- **Severity:** CVSS 8.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 24 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:17 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: `f8f626754ebeca613cf1af2e6f890cfde0e74d5b to before ca96b38730e31357ef4a9d76af1336958ac670d7` (git)
  - affected: `f8f626754ebeca613cf1af2e6f890cfde0e74d5b to before 531255de8971c06d5d5986f85fdc2525d707ba71` (git)
  - affected: `f8f626754ebeca613cf1af2e6f890cfde0e74d5b to before 543354c6efb27eae3372a3a9674aeaa2a86e2b2c` (git)
  - affected: `f8f626754ebeca613cf1af2e6f890cfde0e74d5b to before dc92cb972e86790b8078337ec41015b748b8f8e5` (git)
  - affected: `f8f626754ebeca613cf1af2e6f890cfde0e74d5b to before 1c70275ca87e769e1a52abc644d61372d8c016cb` (git)
  - affected: `f8f626754ebeca613cf1af2e6f890cfde0e74d5b to before 1d42828565889632068fbc2983c34d57c66af4e0` (git)
  - affected: `f8f626754ebeca613cf1af2e6f890cfde0e74d5b to before 4254d5878c320c19961dd0b8e1d0aca4800d8b7d` (git)
  - affected: `f8f626754ebeca613cf1af2e6f890cfde0e74d5b to before ee319bd3a0e976af5087cbe59ebc50a66f31d202` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.8`
  - unaffected: `before 3.8` (semver)
  - unaffected: `5.10.271 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.55 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 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

- 8.1 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0061, the 49th percentile, on 8 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98532](https://www.cve.org/CVERecord?id=CVE-2026-98532)
- [NVD: CVE-2026-98532](https://nvd.nist.gov/vuln/detail/CVE-2026-98532)

### References from the CNA

- <https://git.kernel.org/stable/c/ca96b38730e31357ef4a9d76af1336958ac670d7>
- <https://git.kernel.org/stable/c/531255de8971c06d5d5986f85fdc2525d707ba71>
- <https://git.kernel.org/stable/c/543354c6efb27eae3372a3a9674aeaa2a86e2b2c>
- <https://git.kernel.org/stable/c/dc92cb972e86790b8078337ec41015b748b8f8e5>
- <https://git.kernel.org/stable/c/1c70275ca87e769e1a52abc644d61372d8c016cb>
- <https://git.kernel.org/stable/c/1d42828565889632068fbc2983c34d57c66af4e0>
- <https://git.kernel.org/stable/c/4254d5878c320c19961dd0b8e1d0aca4800d8b7d>
- <https://git.kernel.org/stable/c/ee319bd3a0e976af5087cbe59ebc50a66f31d202>

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-2026-98532>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-98532/>. Everything for agents: <https://agentprime.io/llms.txt>.