# IB/isert: reject PDUs declaring more data than was received

CVE record · `CVE-2026-90414`

- **Identifiers:** `CVE-2026-90414`
- **State:** Confirmed
- **Severity:** CVSS 9.1 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:09 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.

## Critical

Critical, because:

- CVSS score 9.1: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `b8d26b3be8b33682cf163274ed07479a70554633 to before b4706722ed3ea72882b3c986a19b4a1ba66384c4` (git)
  - affected: `b8d26b3be8b33682cf163274ed07479a70554633 to before bc58e9d3dc560220c57b8bdfc12af0cff1c8a43d` (git)
  - affected: `b8d26b3be8b33682cf163274ed07479a70554633 to before 274b1ad7e78338710864c4b4235bb1ce7e7107f9` (git)
  - affected: `b8d26b3be8b33682cf163274ed07479a70554633 to before 2a6b8f88fb7ee51714a1922a039225bdcaf12855` (git)
  - affected: `b8d26b3be8b33682cf163274ed07479a70554633 to before 39da0b7e1f530347d284cebcfc5b5afa90a173bf` (git)
  - affected: `b8d26b3be8b33682cf163274ed07479a70554633 to before cf36fa5357a2fb25776a568d13a3653da7d99bcb` (git)
  - affected: `b8d26b3be8b33682cf163274ed07479a70554633 to before 352dc85324b29f5c85876f2666f3158b645e3f18` (git)
  - affected: `b8d26b3be8b33682cf163274ed07479a70554633 to before 957f92ea4022fb6af4618271615a2a21a7b5bef9` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.10`
  - unaffected: `before 3.10` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0051, the 44th percentile, on 13 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90414](https://www.cve.org/CVERecord?id=CVE-2026-90414)
- [NVD: CVE-2026-90414](https://nvd.nist.gov/vuln/detail/CVE-2026-90414)

### References from the CNA

- <https://git.kernel.org/stable/c/b4706722ed3ea72882b3c986a19b4a1ba66384c4>
- <https://git.kernel.org/stable/c/bc58e9d3dc560220c57b8bdfc12af0cff1c8a43d>
- <https://git.kernel.org/stable/c/274b1ad7e78338710864c4b4235bb1ce7e7107f9>
- <https://git.kernel.org/stable/c/2a6b8f88fb7ee51714a1922a039225bdcaf12855>
- <https://git.kernel.org/stable/c/39da0b7e1f530347d284cebcfc5b5afa90a173bf>
- <https://git.kernel.org/stable/c/cf36fa5357a2fb25776a568d13a3653da7d99bcb>
- <https://git.kernel.org/stable/c/352dc85324b29f5c85876f2666f3158b645e3f18>
- <https://git.kernel.org/stable/c/957f92ea4022fb6af4618271615a2a21a7b5bef9>

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-2026-90414>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90414/>. Everything for agents: <https://agentprime.io/llms.txt>.