# net/iucv: fix the recvmsg window update

CVE record · `CVE-2026-99133`

- **Identifiers:** `CVE-2026-99133`
- **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, 10:34 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: `3881ac441f642d56503818123446f7298442236b to before 01123990f59ce32a1a5e690a4aeee002e932bb07` (git)
  - affected: `3881ac441f642d56503818123446f7298442236b to before 1ebe68bbf8e75eeccaca0c7bc9694f5bc0c3f00a` (git)
  - affected: `3881ac441f642d56503818123446f7298442236b to before 23e7fbbdca5aaba2a9a7bb9e4f2dc179c290ee76` (git)
  - affected: `3881ac441f642d56503818123446f7298442236b to before ce8aac3eb57f5366fa082b7cb8a1ac5652274f37` (git)
  - affected: `3881ac441f642d56503818123446f7298442236b to before 8f2efa742f4cfe7dd756154f8bc07350dbe3ec92` (git)
  - affected: `3881ac441f642d56503818123446f7298442236b to before fe7393a627db2d093e8c0cae69d619b30fefae5f` (git)
  - affected: `3881ac441f642d56503818123446f7298442236b to before fa5acd038ea657ad5033713d6916214cbd349151` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.2`
  - unaffected: `before 3.2` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (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:** 0.0018, the 7th 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-2026-99133](https://www.cve.org/CVERecord?id=CVE-2026-99133)
- [NVD: CVE-2026-99133](https://nvd.nist.gov/vuln/detail/CVE-2026-99133)

### References from the CNA

- <https://git.kernel.org/stable/c/01123990f59ce32a1a5e690a4aeee002e932bb07>
- <https://git.kernel.org/stable/c/1ebe68bbf8e75eeccaca0c7bc9694f5bc0c3f00a>
- <https://git.kernel.org/stable/c/23e7fbbdca5aaba2a9a7bb9e4f2dc179c290ee76>
- <https://git.kernel.org/stable/c/ce8aac3eb57f5366fa082b7cb8a1ac5652274f37>
- <https://git.kernel.org/stable/c/8f2efa742f4cfe7dd756154f8bc07350dbe3ec92>
- <https://git.kernel.org/stable/c/fe7393a627db2d093e8c0cae69d619b30fefae5f>
- <https://git.kernel.org/stable/c/fa5acd038ea657ad5033713d6916214cbd349151>

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-2026-99133>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99133/>. Everything for agents: <https://agentprime.io/llms.txt>.