SB2026082748 - Resource exhaustion in Linux kernel mptcp
Published: August 27, 2026
Security Bulletin ID
SB2026082748
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2026-80588)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 8.7 [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]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper resource management in the mptcp receive path when processing dropped packets before queueing skbs into the receive queue. A remote attacker can trigger pathological drop scenarios to cause a denial of service.
Remediation
Install update from vendor's website.