CVE-2026-80714 ipvs: do not propagate one-packet flag to synced conns
A use-after-free vulnerability in the Linux kernel IPVS module allows attackers to cause denial of service or execute arbitrary code via synced connections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80714?
CVE-2026-80714 is a critical use after free vulnerability in Linux, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ipvs: do not propagate one-packet flag to synced conns
Synced connections can be created before their destination exists. When the destination is later added, ip_vs_bind_dest() copies connection flags from the destination into cp->flags.
IP_VS_CONN_F_ONE_PACKET connections are not synced. If a synced connection inherits IP_VS_CONN_F_ONE_PACKET while it is already hashed, expiry can treat it as a one-packet connection and skip unlinking the existing conn_tab node, leaving stale hash nodes pointing at a freed struct ip_vs_conn.
Drop IP_VS_CONN_F_ONE_PACKET from destination flags when binding synced connections.
Which versions are affected by CVE-2026-80714?
How do I fix CVE-2026-80714?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-80714 being exploited?
There is no known exploitation of CVE-2026-80714 in the wild and no public exploit code.
Sources
Also known as AZL-98105, BELL-CVE-2026-80714, DEBIAN-CVE-2026-80714, GHSA-f6rm-x6vv-8jhg, UBUNTU-CVE-2026-80714.