# ipv4: free inet_opt and ireq_opt after an RCU grace period

CVE record · `CVE-2026-98432`

- **Identifiers:** `CVE-2026-98432`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 15 Oct 2026
- **Updated:** 3 Nov 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 15 Oct 2026, 12:08 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.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `079096f103faca2dd87342cca6f23d4b34da8871 to before b3b027ef0cd322bfa839b9aaf5b27551eea54cf6` (git)
  - affected: `079096f103faca2dd87342cca6f23d4b34da8871 to before 95a8c8fa9f27dce64c40c41c062de7728bf34ab5` (git)
  - affected: `079096f103faca2dd87342cca6f23d4b34da8871 to before 89b5b1eb7d633c33832b7ff2c02e19a144705036` (git)
  - affected: `079096f103faca2dd87342cca6f23d4b34da8871 to before 742f73df544e03744f2981c467d6542fe8172a2a` (git)
  - affected: `079096f103faca2dd87342cca6f23d4b34da8871 to before 11a03ce3c4a62d84c10ccdfe47f8075006498568` (git)
  - affected: `079096f103faca2dd87342cca6f23d4b34da8871 to before a47406c769f72c070386985488f1c4d057df86b2` (git)
  - affected: `079096f103faca2dd87342cca6f23d4b34da8871 to before 26d4c36d318cffbbd160884a0e4cec0da4da4936` (git)
  - affected: `079096f103faca2dd87342cca6f23d4b34da8871 to before e3f33b0a1d89d738e2b913dab519226eaf76e15b` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.4`
  - unaffected: `before 4.4` (semver)
  - unaffected: `5.10.272 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.223 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.190 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.159 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.113 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.56 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.10 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0076, the 55th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 15 Oct 2026, 12:08 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-98432)
- 15 Oct 2026, 13:17 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-98432)

## Sources

- [CVE List: CVE-2026-98432](https://www.cve.org/CVERecord?id=CVE-2026-98432)
- [NVD: CVE-2026-98432](https://nvd.nist.gov/vuln/detail/CVE-2026-98432)

### References from the CNA

- <https://git.kernel.org/stable/c/b3b027ef0cd322bfa839b9aaf5b27551eea54cf6>
- <https://git.kernel.org/stable/c/95a8c8fa9f27dce64c40c41c062de7728bf34ab5>
- <https://git.kernel.org/stable/c/89b5b1eb7d633c33832b7ff2c02e19a144705036>
- <https://git.kernel.org/stable/c/742f73df544e03744f2981c467d6542fe8172a2a>
- <https://git.kernel.org/stable/c/11a03ce3c4a62d84c10ccdfe47f8075006498568>
- <https://git.kernel.org/stable/c/a47406c769f72c070386985488f1c4d057df86b2>
- <https://git.kernel.org/stable/c/26d4c36d318cffbbd160884a0e4cec0da4da4936>
- <https://git.kernel.org/stable/c/e3f33b0a1d89d738e2b913dab519226eaf76e15b>

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-2026-98432>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98432/>. Everything for agents: <https://agentprime.io/llms.txt>.