# Bluetooth: RFCOMM: Validate MTU in rfcomm_apply_pn() to prevent infinite loop

CVE record · `CVE-2026-90088`

- **Identifiers:** `CVE-2026-90088`
- **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: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e7c0aa45ae6c5a338661b23812bfcdef50bf3e96` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before cbc2962da99b6b89345267d3aa74b4b573340548` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 9b2e5f1928c99224345a9ed8c5dae5fc74964d6d` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fc4851ff8dfb505e9a19efcc286712132bbd178d` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before f561e44261344adadf9d6a6dff31e3af9776d5c6` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before aeee917a4878af95f0c63e18c5f22eaf6299c7b8` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 3988cbb1be501dbff909a2ee024670e3c955a66d` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 44c98fd082eafd49d55a8a4077ff488175b2fe24` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.12`
  - unaffected: `before 2.6.12` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (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 12th 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-2026-90088](https://www.cve.org/CVERecord?id=CVE-2026-90088)
- [NVD: CVE-2026-90088](https://nvd.nist.gov/vuln/detail/CVE-2026-90088)

### References from the CNA

- <https://git.kernel.org/stable/c/e7c0aa45ae6c5a338661b23812bfcdef50bf3e96>
- <https://git.kernel.org/stable/c/cbc2962da99b6b89345267d3aa74b4b573340548>
- <https://git.kernel.org/stable/c/9b2e5f1928c99224345a9ed8c5dae5fc74964d6d>
- <https://git.kernel.org/stable/c/fc4851ff8dfb505e9a19efcc286712132bbd178d>
- <https://git.kernel.org/stable/c/f561e44261344adadf9d6a6dff31e3af9776d5c6>
- <https://git.kernel.org/stable/c/aeee917a4878af95f0c63e18c5f22eaf6299c7b8>
- <https://git.kernel.org/stable/c/3988cbb1be501dbff909a2ee024670e3c955a66d>
- <https://git.kernel.org/stable/c/44c98fd082eafd49d55a8a4077ff488175b2fe24>

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-2026-90088>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90088/>. Everything for agents: <https://agentprime.io/llms.txt>.