SB2026050794 - Improper control of a resource through its lifetime in Linux kernel mptcp
Published: May 7, 2026
Security Bulletin ID
SB2026050794
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-43252)
CWE-ID: CWE-664 - Improper control of a resource through its lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state management in the mptcp in-kernel path manager when handling crafted netlink requests that remove endpoints. A local user can send a specially crafted netlink message to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1b3ff4d88b508b73e2bbddb59356311efb7ba192
- https://git.kernel.org/stable/c/4d480efd98e290c445f4ba476e4dcda5624b1aab
- https://git.kernel.org/stable/c/7c1d221e475e3d8eb8ed4702392d43f8c5134d1f
- https://git.kernel.org/stable/c/7e4d88e36e5d0b8ffda637999cbca64c81701a81
- https://git.kernel.org/stable/c/d191101dee25567c2af3b28565f45346c33d65f5
- https://git.kernel.org/stable/c/d90d73ad183566c81320d453a223f610a280f210