Stack-based buffer overflow in Linux kernel - CVE-2026-31513
Published: April 24, 2026
Vulnerability identifier: #VU127635
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-31513
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a stack-based buffer over-read in l2cap_ecred_conn_req when handling a malformed enhanced credit based connection request. A remote attacker can send a specially crafted connection request with more than 5 source channel ids to cause a denial of service.
How to mitigate CVE-2026-31513
Install security update from vendor's repository.