Red Hat Security Advisory: kpatch-patch-4_18_0-477_43_1, kpatch-patch-4_18_0-477_67_1, and
Affects Red HatSource GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 14:50 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Exploitation evidence
Disclosed: evidence found.
CVE published 8 Jan 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
AI-suggested
Red Hat has released official kpatch live patch modules for Red Hat Enterprise Linux 8.8 Extended Update Support to address this vulnerability. Applying these updates and rebooting the system is required to fully remediate the issue. Refer to Red Hat's official advisory and article https://access.redhat.com/articles/11258 for update instructions.
Description
A race condition vulnerability exists in the Linux kernel's Multipath TCP (mptcp) implementation affecting subflow creation in the mptcp_rcv_space_adjust function. This issue is addressed by a kernel live patch module for Red Hat Enterprise Linux 8.8 Extended Update Support. The patch requires a system reboot to take effect.