# libceph: validate banner payload length

CVE record · `CVE-2026-90067`

- **Identifiers:** `CVE-2026-90067`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **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, 16:05 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: `cd1a677cad994021b19665ed476aea63f5d54f31 to before 279c0852999fd2384f4a88155091a99e81f96873` (git)
  - affected: `cd1a677cad994021b19665ed476aea63f5d54f31 to before 6cf666e47f2b51d5a887ec8a3226cde951757d27` (git)
  - affected: `cd1a677cad994021b19665ed476aea63f5d54f31 to before 3b2e62a7655d347a845a91155610ddae11daffc6` (git)
  - affected: `cd1a677cad994021b19665ed476aea63f5d54f31 to before c1b937ff24b19e69aa7fb1b0f46a74d4c9668692` (git)
  - affected: `cd1a677cad994021b19665ed476aea63f5d54f31 to before 6d1c6f228854aa89844fd0152d7ed7ac72a55e89` (git)
  - affected: `cd1a677cad994021b19665ed476aea63f5d54f31 to before c77633a9595658210a6e216a071e5a396a0835a7` (git)
  - affected: `cd1a677cad994021b19665ed476aea63f5d54f31 to before f374967fcdf04001c9b66df1c19106fa83cd91f7` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.11`
  - unaffected: `before 5.11` (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

- 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:** 0.0068, the 52nd 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-2026-90067](https://www.cve.org/CVERecord?id=CVE-2026-90067)
- [NVD: CVE-2026-90067](https://nvd.nist.gov/vuln/detail/CVE-2026-90067)

### References from the CNA

- <https://git.kernel.org/stable/c/279c0852999fd2384f4a88155091a99e81f96873>
- <https://git.kernel.org/stable/c/6cf666e47f2b51d5a887ec8a3226cde951757d27>
- <https://git.kernel.org/stable/c/3b2e62a7655d347a845a91155610ddae11daffc6>
- <https://git.kernel.org/stable/c/c1b937ff24b19e69aa7fb1b0f46a74d4c9668692>
- <https://git.kernel.org/stable/c/6d1c6f228854aa89844fd0152d7ed7ac72a55e89>
- <https://git.kernel.org/stable/c/c77633a9595658210a6e216a071e5a396a0835a7>
- <https://git.kernel.org/stable/c/f374967fcdf04001c9b66df1c19106fa83cd91f7>

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-2026-90067>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90067/>. Everything for agents: <https://agentprime.io/llms.txt>.