# ocfs2: validate orphan slot during inode read

CVE record · `CVE-2026-90205`

- **Identifiers:** `CVE-2026-90205`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:07 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: `b4df6ed8db0c387d38292e31f00adc4cd297ed5a to before edd76be702c0f8702472888425237fb9219e1c43` (git)
  - affected: `b4df6ed8db0c387d38292e31f00adc4cd297ed5a to before f535a34831f8325950933b401c76bfa99624419c` (git)
  - affected: `b4df6ed8db0c387d38292e31f00adc4cd297ed5a to before dea50e8049b0db2eb3d468e2505034962e81d8cd` (git)
  - affected: `b4df6ed8db0c387d38292e31f00adc4cd297ed5a to before c6c908f9b4edfb04534b15573168ae038f7a9cbf` (git)
  - affected: `b4df6ed8db0c387d38292e31f00adc4cd297ed5a to before 3d7c4b7ce7b4baedfd8699fa692cd95f77d332de` (git)
  - affected: `b4df6ed8db0c387d38292e31f00adc4cd297ed5a to before b2d31acbd3b182755b019183fb46949ba5e39b9f` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.16`
  - unaffected: `before 2.6.16` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 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

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel ocfs2 filesystem code is affected from 2.6.16 until fixed. A corrupted inode with an out-of-range orphan slot number can cause an out-of-bounds memory read during orphan processing. The source does not say how an attacker would introduce such corruption. Upgrade to 6.1.191, 6.6.160, 6.12.114, 6.18.52, or a later release in those series.

Written 12 Nov 2026.

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0018, the 7th 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-2026-90205](https://www.cve.org/CVERecord?id=CVE-2026-90205)
- [NVD: CVE-2026-90205](https://nvd.nist.gov/vuln/detail/CVE-2026-90205)

### References from the CNA

- <https://git.kernel.org/stable/c/edd76be702c0f8702472888425237fb9219e1c43>
- <https://git.kernel.org/stable/c/f535a34831f8325950933b401c76bfa99624419c>
- <https://git.kernel.org/stable/c/dea50e8049b0db2eb3d468e2505034962e81d8cd>
- <https://git.kernel.org/stable/c/c6c908f9b4edfb04534b15573168ae038f7a9cbf>
- <https://git.kernel.org/stable/c/3d7c4b7ce7b4baedfd8699fa692cd95f77d332de>
- <https://git.kernel.org/stable/c/b2d31acbd3b182755b019183fb46949ba5e39b9f>

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-2026-90205>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90205/>. Everything for agents: <https://agentprime.io/llms.txt>.