# calipso: keep BIG TCP payload_len in calipso_skbuff_setattr()

CVE record · `CVE-2026-99191`

- **Identifiers:** `CVE-2026-99191`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Oct 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:35 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: `81fbc812132cbc72a0f933b19bfd3a829bd946e4 to before e29d0a00c619ac794b05d64f4438204478137365` (git)
  - affected: `81fbc812132cbc72a0f933b19bfd3a829bd946e4 to before 929dc8e2c9165bb651dca26b2c68067a3880406b` (git)
  - affected: `81fbc812132cbc72a0f933b19bfd3a829bd946e4 to before 1c9fcfca51e3c5cd46dd72a4da74d56eff183513` (git)
  - affected: `81fbc812132cbc72a0f933b19bfd3a829bd946e4 to before 8ee0e03663826a76507048d58466b29321a57656` (git)
  - affected: `81fbc812132cbc72a0f933b19bfd3a829bd946e4 to before 8070ed578b6b9134e045627fb745c887a806d46e` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.19`
  - unaffected: `before 5.19` (semver)
  - unaffected: `6.6.161 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.115 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.59 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.13 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:** 0.0017, the 6th percentile, on 6 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 28 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-99191](https://www.cve.org/CVERecord?id=CVE-2026-99191)
- [NVD: CVE-2026-99191](https://nvd.nist.gov/vuln/detail/CVE-2026-99191)

### References from the CNA

- <https://git.kernel.org/stable/c/e29d0a00c619ac794b05d64f4438204478137365>
- <https://git.kernel.org/stable/c/929dc8e2c9165bb651dca26b2c68067a3880406b>
- <https://git.kernel.org/stable/c/1c9fcfca51e3c5cd46dd72a4da74d56eff183513>
- <https://git.kernel.org/stable/c/8ee0e03663826a76507048d58466b29321a57656>
- <https://git.kernel.org/stable/c/8070ed578b6b9134e045627fb745c887a806d46e>

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-2026-99191>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99191/>. Everything for agents: <https://agentprime.io/llms.txt>.