# blk-cgroup: fix race between policy activation and blkg destruction

CVE record · `CVE-2026-90326`

- **Identifiers:** `CVE-2026-90326`
- **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:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:08 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: `81c1188905f88b77743d1fdeeedfc8cb7b67787d to before b5dae1cd0d8368b4338430ff93403df67f0b8bcc` (git)
  - affected: `bfe46d2efe46c5c952f982e2ca94fe2ec5e58e2a to before 083b58373463a6e5ee60ecb135269348f68ad7df` (git)
  - affected: `f1c006f1c6850c14040f8337753a63119bba39b9 to before 17c18a0df70c2b89ff7fcd74622f1540e98d00fd` (git)
  - affected: `f1c006f1c6850c14040f8337753a63119bba39b9 to before 91062e3a9ed251726df4e20ff9a1113f1c8ded59` (git)
  - affected: `f1c006f1c6850c14040f8337753a63119bba39b9 to before ac34e655dffa74349d885a43d098115336f53842` (git)
  - affected: `f1c006f1c6850c14040f8337753a63119bba39b9 to before 2cf9f50a38c1839e549a08e22aa35e8d69e2c8fd` (git)
  - affected: `f1c006f1c6850c14040f8337753a63119bba39b9 to before 5313d4d41739b0cb63000747c97bb1217ac45f3e` (git)
  - affected: `6.1.16 to before 6.1.17` (semver)
  - affected: `6.2.3 to before 6.2.4` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.3`
  - unaffected: `before 6.3` (semver)
  - unaffected: `6.1.17 to 6.1.*, inclusive` (semver)
  - unaffected: `6.2.4 to 6.2.*, 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

## 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:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th 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-2026-90326](https://www.cve.org/CVERecord?id=CVE-2026-90326)
- [NVD: CVE-2026-90326](https://nvd.nist.gov/vuln/detail/CVE-2026-90326)

### References from the CNA

- <https://git.kernel.org/stable/c/b5dae1cd0d8368b4338430ff93403df67f0b8bcc>
- <https://git.kernel.org/stable/c/083b58373463a6e5ee60ecb135269348f68ad7df>
- <https://git.kernel.org/stable/c/17c18a0df70c2b89ff7fcd74622f1540e98d00fd>
- <https://git.kernel.org/stable/c/91062e3a9ed251726df4e20ff9a1113f1c8ded59>
- <https://git.kernel.org/stable/c/ac34e655dffa74349d885a43d098115336f53842>
- <https://git.kernel.org/stable/c/2cf9f50a38c1839e549a08e22aa35e8d69e2c8fd>
- <https://git.kernel.org/stable/c/5313d4d41739b0cb63000747c97bb1217ac45f3e>

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-2026-90326>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90326/>. Everything for agents: <https://agentprime.io/llms.txt>.