# Bluetooth: virtio_bt: avoid OOB read of build info string

CVE record · `CVE-2026-90257`

- **Identifiers:** `CVE-2026-90257`
- **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: `afd2daa26c7abd734d78bd274fc6c59a15e61063 to before fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e` (git)
  - affected: `afd2daa26c7abd734d78bd274fc6c59a15e61063 to before d08c99abf06133a7829d46627e77e3315ca974d2` (git)
  - affected: `afd2daa26c7abd734d78bd274fc6c59a15e61063 to before 0e388d805233a883a31271676eae6031dfc9e898` (git)
  - affected: `afd2daa26c7abd734d78bd274fc6c59a15e61063 to before 54e9387eb7546eaa6f600220599d55740956ffc3` (git)
  - affected: `afd2daa26c7abd734d78bd274fc6c59a15e61063 to before be1e3df2c49c91b0a052c6563884e8d39bd768b2` (git)
  - affected: `afd2daa26c7abd734d78bd274fc6c59a15e61063 to before 84ea9c99874804f5ca13f35bbc186ba93902f30f` (git)
  - affected: `afd2daa26c7abd734d78bd274fc6c59a15e61063 to before 502adc06ba76dee19c292ae4a07d74d202fe734d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.13`
  - unaffected: `before 5.13` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 11th 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-2026-90257](https://www.cve.org/CVERecord?id=CVE-2026-90257)
- [NVD: CVE-2026-90257](https://nvd.nist.gov/vuln/detail/CVE-2026-90257)

### References from the CNA

- <https://git.kernel.org/stable/c/fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e>
- <https://git.kernel.org/stable/c/d08c99abf06133a7829d46627e77e3315ca974d2>
- <https://git.kernel.org/stable/c/0e388d805233a883a31271676eae6031dfc9e898>
- <https://git.kernel.org/stable/c/54e9387eb7546eaa6f600220599d55740956ffc3>
- <https://git.kernel.org/stable/c/be1e3df2c49c91b0a052c6563884e8d39bd768b2>
- <https://git.kernel.org/stable/c/84ea9c99874804f5ca13f35bbc186ba93902f30f>
- <https://git.kernel.org/stable/c/502adc06ba76dee19c292ae4a07d74d202fe734d>

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-2026-90257>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90257/>. Everything for agents: <https://agentprime.io/llms.txt>.