# Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp

CVE record · `CVE-2026-63975`

- **Identifiers:** `CVE-2026-63975`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-667](https://cwe.mitre.org/data/definitions/667.html)
- **Tags:** [CWE-667](https://agentprime.io/advisories/tag/cwe-667.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 19 Jul 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 19 Jul 2026, 14:56 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: `15f02b91056253e8cdc592888f431da0731337b8 to before 3c8eaa91eb433c450426539290be4ffe282e9f00` (git)
  - affected: `15f02b91056253e8cdc592888f431da0731337b8 to before ecfed1e0d8efecad6737a0d83e21d2fd021d8c48` (git)
  - affected: `15f02b91056253e8cdc592888f431da0731337b8 to before e6833e737a51db1e5ea0401322acf5e22abd8be6` (git)
  - affected: `15f02b91056253e8cdc592888f431da0731337b8 to before 6319b38fe69f56ed95680ade485b957a53fff642` (git)
  - affected: `15f02b91056253e8cdc592888f431da0731337b8 to before 291eec1041c918c460dc9702e44edd17794b4a4b` (git)
  - affected: `15f02b91056253e8cdc592888f431da0731337b8 to before 41e29548b5e8b5e5fcf708786b3bea67cab107fa` (git)
  - affected: `15f02b91056253e8cdc592888f431da0731337b8 to before d153b8898c0051eb8b6a083b35cbe304a5886bd5` (git)
  - affected: `15f02b91056253e8cdc592888f431da0731337b8 to before 41c2713b204e6cb6a94587bc6bf6935107df5479` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.7`
  - unaffected: `before 5.7` (semver)
  - unaffected: `5.10.259 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.210 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.176 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.143 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.93 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.35 to 6.18.*, inclusive` (semver)
  - unaffected: `7.0.12 to 7.0.*, inclusive` (semver)
  - unaffected: `7.1 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

- 8.8 High, CVSS 3.1: `CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0027, the 19th percentile, on 5 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 19 Jul 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-63975](https://www.cve.org/CVERecord?id=CVE-2026-63975)
- [NVD: CVE-2026-63975](https://nvd.nist.gov/vuln/detail/CVE-2026-63975)

### References from the CNA

- <https://git.kernel.org/stable/c/3c8eaa91eb433c450426539290be4ffe282e9f00>
- <https://git.kernel.org/stable/c/ecfed1e0d8efecad6737a0d83e21d2fd021d8c48>
- <https://git.kernel.org/stable/c/e6833e737a51db1e5ea0401322acf5e22abd8be6>
- <https://git.kernel.org/stable/c/6319b38fe69f56ed95680ade485b957a53fff642>
- <https://git.kernel.org/stable/c/291eec1041c918c460dc9702e44edd17794b4a4b>
- <https://git.kernel.org/stable/c/41e29548b5e8b5e5fcf708786b3bea67cab107fa>
- <https://git.kernel.org/stable/c/d153b8898c0051eb8b6a083b35cbe304a5886bd5>
- <https://git.kernel.org/stable/c/41c2713b204e6cb6a94587bc6bf6935107df5479>

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-2026-63975>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-63975/>. Everything for agents: <https://agentprime.io/llms.txt>.