# null_blk: reject per-device queue resize for shared tag set

CVE record · `CVE-2026-90186`

- **Identifiers:** `CVE-2026-90186`
- **State:** Confirmed
- **Severity:** No CVSS score
- **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, 16:07 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: `45919fbfe1c487c17ea1d198534339a5e8abeae3 to before 9c7bae099ddc92676ad1b7e29dd6c089e5f6196c` (git)
  - affected: `45919fbfe1c487c17ea1d198534339a5e8abeae3 to before fcd53f3e8b758c79c3f2420d28a2a1dce6fda61a` (git)
  - affected: `45919fbfe1c487c17ea1d198534339a5e8abeae3 to before f609f7bf9ce8c2fc427705c4a9f623a281239d06` (git)
  - affected: `45919fbfe1c487c17ea1d198534339a5e8abeae3 to before 3e35ad503386a2e8a0e0460530dcbf421c79f6f2` (git)
  - affected: `45919fbfe1c487c17ea1d198534339a5e8abeae3 to before baff300541a0012907cdde349728739fe16176d7` (git)
  - affected: `45919fbfe1c487c17ea1d198534339a5e8abeae3 to before 1cdfe2fa62b48728a9b436fbbd3dbe4c11593e24` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.5`
  - unaffected: `before 5.5` (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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0021, the 10th 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-2026-90186](https://www.cve.org/CVERecord?id=CVE-2026-90186)
- [NVD: CVE-2026-90186](https://nvd.nist.gov/vuln/detail/CVE-2026-90186)

### References from the CNA

- <https://git.kernel.org/stable/c/9c7bae099ddc92676ad1b7e29dd6c089e5f6196c>
- <https://git.kernel.org/stable/c/fcd53f3e8b758c79c3f2420d28a2a1dce6fda61a>
- <https://git.kernel.org/stable/c/f609f7bf9ce8c2fc427705c4a9f623a281239d06>
- <https://git.kernel.org/stable/c/3e35ad503386a2e8a0e0460530dcbf421c79f6f2>
- <https://git.kernel.org/stable/c/baff300541a0012907cdde349728739fe16176d7>
- <https://git.kernel.org/stable/c/1cdfe2fa62b48728a9b436fbbd3dbe4c11593e24>

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-2026-90186>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90186/>. Everything for agents: <https://agentprime.io/llms.txt>.