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CVSS 9.8 · CRITICAL

CVE-2026-80714Corrupción de memoria en el módulo IPVS del Kernel de Linux

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.

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Análisis

A critical vulnerability has been identified in the Linux kernel IPVS (IP Virtual Server) subsystem, which could lead to memory corruption or use-after-free. This is particularly relevant for environments using IPVS for load balancing or Kubernetes clusters running kube-proxy in IPVS mode.

Roles relevantes

LinuxciberseguridadCloudBackendC

Severidad

Puntaje: 9.8(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: UNCHANGED
C: HIGH
I: HIGH
A: HIGH

EPSS

Probabilidad de explotación (próx. 30 días): 0.0016 (0.2%)
Percentil: 5.9%
EPSS: 2026-08-28

Descripción técnica

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.

Publicada: 28/8/2026, 8:16:57
Última modificación: 29/8/2026, 7:16:52

Referencias

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