# netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack()

CVE record · `CVE-2026-97417`

- **Identifiers:** `CVE-2026-97417`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 3 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 16:03 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: `bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 to before 740ad3d17a281f7764dda4dbeb37cea52e2e31ae` (git)
  - affected: `bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 to before a0523267de2523522b0f70972dd1ffa22ec6176c` (git)
  - affected: `bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 to before 55bcc3376cd7b18954cc9814da697504fdaf12bf` (git)
  - affected: `bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 to before 0d5ad732e4fdc569eb85861115e8f7b4c2c67852` (git)
  - affected: `bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 to before 7ecfa46a536578a7ed335ddf31a854127268c27c` (git)
  - affected: `bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 to before 4abc1af7ac209c066f4e5dd75cdd56876e5829a9` (git)
  - affected: `bb9fc37358ffa9de1cc2b2b6f1a559b926ef50d9 to before d3bf9eae486490832bd08fd62ab0ac601f346bd4` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.1`
  - unaffected: `before 3.1` (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: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0049, the 42nd percentile, on 12 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 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-97417](https://www.cve.org/CVERecord?id=CVE-2026-97417)
- [NVD: CVE-2026-97417](https://nvd.nist.gov/vuln/detail/CVE-2026-97417)

### References from the CNA

- <https://git.kernel.org/stable/c/740ad3d17a281f7764dda4dbeb37cea52e2e31ae>
- <https://git.kernel.org/stable/c/a0523267de2523522b0f70972dd1ffa22ec6176c>
- <https://git.kernel.org/stable/c/55bcc3376cd7b18954cc9814da697504fdaf12bf>
- <https://git.kernel.org/stable/c/0d5ad732e4fdc569eb85861115e8f7b4c2c67852>
- <https://git.kernel.org/stable/c/7ecfa46a536578a7ed335ddf31a854127268c27c>
- <https://git.kernel.org/stable/c/4abc1af7ac209c066f4e5dd75cdd56876e5829a9>
- <https://git.kernel.org/stable/c/d3bf9eae486490832bd08fd62ab0ac601f346bd4>

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-2026-97417>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-97417/>. Everything for agents: <https://agentprime.io/llms.txt>.