What’s Vulnerable › Vulnerabilities

CVE-2026-80714: ipvs: do not propagate one-packet flag to synced conns

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-10-16

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.

Affected products

• Linux kernel: 2.6.36 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/06d1d9b56ef8132fbf85006885eb43d9510b8b02
• https://git.kernel.org/stable/c/300348e3ba1521b003d59825f97e24f9a6859688
• https://git.kernel.org/stable/c/44af98cc7d5ef8e730488d5df1eecd5deeaa5947
• https://git.kernel.org/stable/c/4649e6faeecdc2d44bfa6ccbe405eef27e55d816
• https://git.kernel.org/stable/c/a63d2dbaeb50a85d4c976b15a36e6b0c7113db5b
• https://git.kernel.org/stable/c/acbdc276091b308ca7794acb86e761f8203e2f59
• https://git.kernel.org/stable/c/b5ee5b266f833601ac4817f6df0bc496fc376a28
• https://git.kernel.org/stable/c/e7acfc990c29890c883d0d0ce3f737d003a43b44

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