# netfilter: nf_nat_sip: rewind offset when NAT shrinks the packet

CVE record · `CVE-2026-100070`

- **Identifiers:** `CVE-2026-100070`
- **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, 13:06 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: `c978cd3a937141deaf7995b849824af6dacdeae7 to before 6828aca3d82717c2fda92af81c0dda642bc2b465` (git)
  - affected: `c978cd3a937141deaf7995b849824af6dacdeae7 to before 2703f5ea8d85bc729f433ac09ee902084c947122` (git)
  - affected: `c978cd3a937141deaf7995b849824af6dacdeae7 to before 0f4d30e2e49f343fc28ba1e259fd22969b940c46` (git)
  - affected: `c978cd3a937141deaf7995b849824af6dacdeae7 to before 810da5a63549531da78348b0a4545042d84e01e2` (git)
  - affected: `c978cd3a937141deaf7995b849824af6dacdeae7 to before 668cc1c30caedc63070b10d17d5514748988a140` (git)
  - affected: `c978cd3a937141deaf7995b849824af6dacdeae7 to before e70d48fcf8382581162608a4a322919bfd22aef3` (git)
  - affected: `c978cd3a937141deaf7995b849824af6dacdeae7 to before c408d416618ebb8a95e3097a13f3b793ea9272ee` (git)
  - affected: `c978cd3a937141deaf7995b849824af6dacdeae7 to before 16aecbe3036f6097c26b51b12e4c1cf207769690` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.26`
  - unaffected: `before 2.6.26` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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:** 0.0011, the 1st 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-2026-100070](https://www.cve.org/CVERecord?id=CVE-2026-100070)
- [NVD: CVE-2026-100070](https://nvd.nist.gov/vuln/detail/CVE-2026-100070)

### References from the CNA

- <https://git.kernel.org/stable/c/6828aca3d82717c2fda92af81c0dda642bc2b465>
- <https://git.kernel.org/stable/c/2703f5ea8d85bc729f433ac09ee902084c947122>
- <https://git.kernel.org/stable/c/0f4d30e2e49f343fc28ba1e259fd22969b940c46>
- <https://git.kernel.org/stable/c/810da5a63549531da78348b0a4545042d84e01e2>
- <https://git.kernel.org/stable/c/668cc1c30caedc63070b10d17d5514748988a140>
- <https://git.kernel.org/stable/c/e70d48fcf8382581162608a4a322919bfd22aef3>
- <https://git.kernel.org/stable/c/c408d416618ebb8a95e3097a13f3b793ea9272ee>
- <https://git.kernel.org/stable/c/16aecbe3036f6097c26b51b12e4c1cf207769690>

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-2026-100070>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-100070/>. Everything for agents: <https://agentprime.io/llms.txt>.