# Bluetooth: btmtksdio: Fix out-of-bounds DMA read in the TX path

CVE record · `CVE-2026-90090`

- **Identifiers:** `CVE-2026-90090`
- **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, 16:06 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: `9aebfd4a2200ab8075e44379c758bccefdc589bb to before c8742f53c9ef623decd5285403df0e5b5273c9fd` (git)
  - affected: `9aebfd4a2200ab8075e44379c758bccefdc589bb to before 0b71a6caaf284915c8cf9cd320ecee9f0361824a` (git)
  - affected: `9aebfd4a2200ab8075e44379c758bccefdc589bb to before 9a785ea864214aaffd8300683825c3f788d0b634` (git)
  - affected: `9aebfd4a2200ab8075e44379c758bccefdc589bb to before 7b37556d7d801b79096c7ba8ea92db2338aa8b00` (git)
  - affected: `9aebfd4a2200ab8075e44379c758bccefdc589bb to before 7b80d2701a68456c536f82e577dbed2f60ccb82b` (git)
  - affected: `9aebfd4a2200ab8075e44379c758bccefdc589bb to before fa0ad2d277c7adead61d1c22411c55cea6990c2a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.2`
  - unaffected: `before 5.2` (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 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-2026-90090](https://www.cve.org/CVERecord?id=CVE-2026-90090)
- [NVD: CVE-2026-90090](https://nvd.nist.gov/vuln/detail/CVE-2026-90090)

### References from the CNA

- <https://git.kernel.org/stable/c/c8742f53c9ef623decd5285403df0e5b5273c9fd>
- <https://git.kernel.org/stable/c/0b71a6caaf284915c8cf9cd320ecee9f0361824a>
- <https://git.kernel.org/stable/c/9a785ea864214aaffd8300683825c3f788d0b634>
- <https://git.kernel.org/stable/c/7b37556d7d801b79096c7ba8ea92db2338aa8b00>
- <https://git.kernel.org/stable/c/7b80d2701a68456c536f82e577dbed2f60ccb82b>
- <https://git.kernel.org/stable/c/fa0ad2d277c7adead61d1c22411c55cea6990c2a>

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-2026-90090>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90090/>. Everything for agents: <https://agentprime.io/llms.txt>.