EUVD-2026-32166

In the Linux kernel, the following vulnerability has been resolved: openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate a fixed-size skb with nlmsgnewNLMSGDEFAULTSIZE, ... but serialize the full upcall PID array via ovsvportgetupcallportids...

CVE-2026-45840

In the Linux kernel, the following vulnerability has been resolved: openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate a fixed-size skb with nlmsgnewNLMSGDEFAULTSIZE, ... but serialize the full upcall PID array via ovsvportgetupcallportids...

CVE-2026-45840

CVE-2026-45840 : The vulnerability in the Linux kernel openvswitch path allows a CAP_NET_ADMIN user to overflow the vport netlink reply buffer by providing a large upcall PID array, triggering a -EMSGSIZE and a kernel BUG. The root cause is ovs_vport_set_upcall_portids() accepting any non-zero mu...

CVE-2026-45840 openvswitch: cap upcall PID array size and pre-size vport replies

In the Linux kernel, the following vulnerability has been resolved: openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate a fixed-size skb with nlmsgnewNLMSGDEFAULTSIZE, ... but serialize the full upcall PID array via ovsvportgetupcallportids...

PT-2026-43674

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the openvswitch component where vport netlink reply helpers allocate a fixed-size socket buffer skb using nlmsg newNLMSG DEFAULT SIZE, ..., but serialize the full upca...

Linux Distros Unpatched Vulnerability : CVE-2026-45840

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate a fixed-size skb with nlmsgnewNLMSGDEFAULTSIZE, ... b...

CVE-2026-45840: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: openvswitch: cap upcall PID array size and pre-size vport replies The vport netlink reply helpers allocate a fixed-size skb with nlmsgnewNLMSGDEFAULTSIZE, ... but serialize the full upcall PID array via ovsvportgetupcallportids...

SUSE-SU-2026:1871-1 Security update for openvswitch

This update for openvswitch fixes the following issue: - CVE-2026-34956: Invalid memory access in conntrack FTP alg bsc1261273...

Medium: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix race on port output CVE-2023-53188 In the Linux kernel, the following vulnerability has been resolved: ipvs: properly dereference pe in ipvsaddservice CVE-2024-42322 In the Linux kernel, the...

SUSE CVE-2026-39402

lxc is a Linux container runtime. In the setuid helper lxc-user-nic, the delete path contains a logic flaw in the findline function that allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When lxc-user-nic delete scans its NIC database to authorize a...

RHCOS 4 : OpenShift Container Platform 4.9.0 (RHSA-2021:3758)

The remote Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3758 advisory. - coreos-installer: restrict access permissions on /boot/ignition,/config.ign CVE-2021-3917 - jetty: requests to the ConcatServlet a...

CVE-2026-39402

lxc is a Linux container runtime. In the setuid helper lxc-user-nic, the delete path contains a logic flaw in the findline function that allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When lxc-user-nic delete scans its NIC database to authorize a...

CVE-2026-39402 lxc lxc-user-nic insufficient ownership validation allows cross-tenant OVS port deletion

lxc is a Linux container runtime. In the setuid helper lxc-user-nic, the delete path contains a logic flaw in the findline function that allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When lxc-user-nic delete scans its NIC database to authorize a...

EUVD-2026-27497

lxc is a Linux container runtime. In the setuid helper lxc-user-nic, the delete path contains a logic flaw in the findline function that allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When lxc-user-nic delete scans its NIC database to authorize a...

CVE-2026-39402 lxc lxc-user-nic insufficient ownership validation allows cross-tenant OVS port deletion

lxc is a Linux container runtime. In the setuid helper lxc-user-nic, the delete path contains a logic flaw in the findline function that allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When lxc-user-nic delete scans its NIC database to authorize a...

CVE-2026-39402: Incorrect Authorization

lxc is a Linux container runtime. In the setuid helper lxc-user-nic, the delete path contains a logic flaw in the findline function that allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When lxc-user-nic delete scans its NIC database to authorize a...

PT-2026-44288

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A self-deadlock occurs in the openvswitch vport during the release of tunnel ports. Vports are protected by RCU Read-Copy-Update, a synchronization mechanism that allows multiple readers...

net: openvswitch: Avoid releasing netdev before teardown completes

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PT-2026-36995

Name of the Vulnerable Software and Affected Versions lxc versions prior to 7.0.0 Description A logic flaw in the find line function of the lxc-user-nic setuid helper allows an unprivileged user to delete OVS-attached network interfaces belonging to other users. When scanning the NIC database to...

CVE-2026-31679

A flaw was found in the Linux kernel's openvswitch component. This vulnerability arises from improper validation of Multiprotocol Label Switching MPLS payload lengths during SET/SETMASKED actions. An attacker could potentially exploit this by providing malformed MPLS key data, leading to unexpect...