# ceph: properly decrypt filenames in vmalloc() buffers

CVE record · `CVE-2026-90042`

- **Identifiers:** `CVE-2026-90042`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:33 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 9.8: 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: `457117f077c6749d1e28469eae91fb69c9806768 to before 23c5cc9652c6ee85617002cb66e1068395045de6` (git)
  - affected: `457117f077c6749d1e28469eae91fb69c9806768 to before 93729594af506557a86f8b603be7ac5f3370eeca` (git)
  - affected: `457117f077c6749d1e28469eae91fb69c9806768 to before 110747ff535e3d98ac17d68dbd056bb6ef000e23` (git)
  - affected: `457117f077c6749d1e28469eae91fb69c9806768 to before 3b467c68803d7c7e82678289e598afd44faa6101` (git)
  - affected: `457117f077c6749d1e28469eae91fb69c9806768 to before e939fc6a7bd969a58a150b7f188c1047138403e3` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.6`
  - unaffected: `before 6.6` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0050, the 43rd 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90042](https://www.cve.org/CVERecord?id=CVE-2026-90042)
- [NVD: CVE-2026-90042](https://nvd.nist.gov/vuln/detail/CVE-2026-90042)

### References from the CNA

- <https://git.kernel.org/stable/c/23c5cc9652c6ee85617002cb66e1068395045de6>
- <https://git.kernel.org/stable/c/93729594af506557a86f8b603be7ac5f3370eeca>
- <https://git.kernel.org/stable/c/110747ff535e3d98ac17d68dbd056bb6ef000e23>
- <https://git.kernel.org/stable/c/3b467c68803d7c7e82678289e598afd44faa6101>
- <https://git.kernel.org/stable/c/e939fc6a7bd969a58a150b7f188c1047138403e3>

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-2026-90042>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90042/>. Everything for agents: <https://agentprime.io/llms.txt>.