# bpf: Fix out-of-bounds read of rtt_min in sock_ops

CVE record · `CVE-2026-98643`

- **Identifiers:** `CVE-2026-98643`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:20 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: `44f0e43037d3a17b043843ba67610ac7c7e37db6 to before 0c796efa919f52f788c22c79d1f1b70321696b3d` (git)
  - affected: `44f0e43037d3a17b043843ba67610ac7c7e37db6 to before fc9d0e6e9d86fbefe7b8fe6ee49f4cf102add79d` (git)
  - affected: `44f0e43037d3a17b043843ba67610ac7c7e37db6 to before fd6bf2721933d8c90bc4ce57f3e204c9295e7e3f` (git)
  - affected: `44f0e43037d3a17b043843ba67610ac7c7e37db6 to before a8a9becbac93a9f54f4d565f1f3005eb08a7912f` (git)
  - affected: `44f0e43037d3a17b043843ba67610ac7c7e37db6 to before 3a46f14e6cf375f3ca38f8f6e6524749e24ea0a8` (git)
  - affected: `44f0e43037d3a17b043843ba67610ac7c7e37db6 to before 6785313d4fac96afb21ef193610c1fa88b1a9e64` (git)
  - affected: `44f0e43037d3a17b043843ba67610ac7c7e37db6 to before cba54d142c43ec96d8c4d566f66439e8c0afded7` (git)
  - affected: `44f0e43037d3a17b043843ba67610ac7c7e37db6 to before 75f8cf22463d82bb1fb0239a3d485fc8f4c8ef03` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.16`
  - unaffected: `before 4.16` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0021, the 11th percentile, on 7 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-2026-98643](https://www.cve.org/CVERecord?id=CVE-2026-98643)
- [NVD: CVE-2026-98643](https://nvd.nist.gov/vuln/detail/CVE-2026-98643)

### References from the CNA

- <https://git.kernel.org/stable/c/0c796efa919f52f788c22c79d1f1b70321696b3d>
- <https://git.kernel.org/stable/c/fc9d0e6e9d86fbefe7b8fe6ee49f4cf102add79d>
- <https://git.kernel.org/stable/c/fd6bf2721933d8c90bc4ce57f3e204c9295e7e3f>
- <https://git.kernel.org/stable/c/a8a9becbac93a9f54f4d565f1f3005eb08a7912f>
- <https://git.kernel.org/stable/c/3a46f14e6cf375f3ca38f8f6e6524749e24ea0a8>
- <https://git.kernel.org/stable/c/6785313d4fac96afb21ef193610c1fa88b1a9e64>
- <https://git.kernel.org/stable/c/cba54d142c43ec96d8c4d566f66439e8c0afded7>
- <https://git.kernel.org/stable/c/75f8cf22463d82bb1fb0239a3d485fc8f4c8ef03>

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-2026-98643>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98643/>. Everything for agents: <https://agentprime.io/llms.txt>.