net: openvswitch: reject oversized nested action attrs

...

New OVSwrap Linux Kernel Flaw Lets Local Users Gain Root via Open vSwitch

A memory corruption flaw in the Linux kernel's Open vSwitch datapath gives ordinary local users a path to root on a broad set of default-configured distributions, and a public exploit ships with pre-built records for roughly 800 kernel builds. The vulnerability, tracked asCVE-2026-64531CVSS score...

Important: kernel-livepatch-6.12.90-120.164

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs CVE-2026-64531 In the Linux kernel, the following vulnerability has been resolved: xfs: resample the data fork mapping after cycling ILOCK CVE-2026-64600...

Exploit for CVE-2026-64531

ovswrap-poc CVE-2026-...

Exploit for CVE-2026-64531

OVSwrap CVE-2026-64531 Mitigation Tool A simple script that...

AZL-93965 CVE-2026-64531 affecting package kernel for versions less than 6.6.145.2-1

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nlalen field is u16. Commit a1e64addf3ff "net: openvswitch: remove misbehaving actions length check" allowed the...

CVE-2026-64531

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nlalen field is u16. Commit a1e64addf3ff "net: openvswitch: remove misbehaving actions length check" allowed the...

CVE-2026-64531: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nlalen field is u16. Commit a1e64addf3ff "net: openvswitch: remove misbehaving actions length check" allowed the...

Open vSwitch validate_push_nsh() function Data Compromise

The vulnerability of the validatepushnsh function in the netopenvswitch/flownetlink.c module, which is part of the Open vSwitch router support in Linux operating systems, relates to the pointer manipulation. Exploiting this vulnerability could allow an attacker to compromise the confidentiality,...

Linux Distros Unpatched Vulnerability : CVE-2026-53227

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net: openvswitch: fix possible kfreeskb of ERRPTR After the patch in the Fixes tag, the allocation of the reply skb can happen either before or after locking th...

CVE-2026-53227

A flaw was found in the Linux kernel's Open vSwitch OVS component. This issue occurs due to incorrect error handling during the allocation of a 'reply' skb socket buffer after locking the ovsmutex. If the allocation fails, an invalid pointer may be passed to kfreeskb, leading to a system crash an...

AZL-90860 CVE-2026-53227 affecting package kernel for versions less than 6.6.143.1-1

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix possible kfreeskb of ERRPTR After the patch in the "Fixes" tag, the allocation of the "reply" skb can happen either before or after locking the ovsmutex. However, error cleanups still follow the classical...

CVE-2026-53227

CVE-2026-53227 affects the Linux kernel net/openvswitch path. The issue arises when allocating the reply skb after taking ovs_mutex, where an error path can leave the skb with an ERR_PTR and later free it during cleanup, leading to a possible invalid free. The fix sets the pointer to NULL after s...

Security update for openvswitch3

This update for openvswitch3 fixes the following issues CVE-2026-5265: heap over-read in ICMP error response generation bsc1262498. CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing bsc1262499. Patch Instructions: To install this SUSE update use the SUSE recommended installation...

Security update for openvswitch

This update for openvswitch fixes the following issues CVE-2026-5265: heap over-read in ICMP error response generation bsc1262498. CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing bsc1262499. Patch Instructions: To install this SUSE update use the SUSE recommended installation...

Important: kernel6.18

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroupstoragegetnextkey CVE-2026-45838 In the Linux kernel, the following vulnerability has been resolved: bpf: reject negative CO-RE accessor indices in bpfcoreparsespec...

Security update for openvswitch

This update for openvswitch fixes the following issues Update ovn to 25.03.3: CVE-2026-5265: heap over-read in ICMP error response generation bsc1262498. CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing bsc1262499. Patch Instructions: To install this SUSE update use the SUSE...

OPENSUSE-SU-2026:20972-1 Security update for openvswitch

This update for openvswitch fixes the following issues - CVE-2026-5265: heap over-read in ICMP error response generation bsc1262498. - CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing bsc1262499. - CVE-2026-34956: Invalid memory access in conntrack FTP alg bsc1261273. Changes for...

ALSA-2026:25217 Important: kernel security update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: scsi: target: iscsi: Fix use-after-free in iscsitdecconnusagecount CVE-2026-23216 kernel: Linux kernel: Use-after-free in bonding driver leads to denial of service CVE-2026-31419 kernel:...

CVE-2026-36499

A flaw was found in Open vSwitch. A missing upper-bound check in udpifsetthreads allows an attacker with OVSDB write access to request an excessive number of handler or revalidation threads, causing resource exhaustion and denial of service. Reported against Open vSwitch v3.6.90; affects...