CVE-2026-64434
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. https://security-tracker.debian.org/tracker/DSA-6405-1
CSIRTS triage
- What
- The vulnerability is a use-after-free (UAF) issue in the Bluetooth L2CAP channel timeout handling.
- Who is affected
- Users of Bluetooth L2CAP are affected by this vulnerability.
- Urgency
- Immediate remediation is advised due to the potential for exploitation leading to UAF issues.
- Action
- Implement the fix for the UAF in Bluetooth L2CAP channel timeout.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
Advisory coverage (3)
- unknownDSA-6405-1 linux - security updatedebian · 2026-07-31
- highCVE-2026-64434: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix UAF …nvd · 2026-07-25
- mediumCVE-2026-64434: Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn refmsrc · 2026-07-14
External references
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