Use-after-free in Linux kernel - CVE-2026-80714

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Main Vulnerability Database Vulnerabilities #VU146059

Use-after-free in Linux kernel - CVE-2026-80714

Published: August 28, 2026


Vulnerability identifier: #VU146059
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-80714
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a use-after-free in the ipvs connection handling logic when binding synced connections to a destination. A local user can trigger creation and expiry of a crafted synced connection state to cause a denial of service.

The issue occurs when a synced connection inherits the one-packet flag after it is already hashed, which can leave stale hash nodes pointing to a freed struct ip_vs_conn.


Affected software

Linux kernel
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
kernel-rt (Red Hat package)
kernel (Red Hat package)

How to mitigate CVE-2026-80714

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-rt (Red Hat package) - update to 4.18.0-553.168.1.rt7.509.el8_10
kernel (Red Hat package) - update to 5.14.0-687.52.1.el9_8

External References

Related Security Bulletins