CVE-2026-80733 net: remove WARN_ON_ONCE() from sk_mc_loop()

In the Linux kernel, the following vulnerability has been resolved: net: remove WARNONONCE from skmcloop skmcloop can be called for sockets that are neither AFINET nor AFINET6 e.g. AFPACKET sockets when sending packets via raw/packet socket over virtual devices such as VRF or ipvlan. In such case...

CVE-2026-80733

CVE-2026-80733 affects the Linux kernel 's sk_mc_loop() networking function. When called for non-INET sockets—such as AF_PACKET sockets sending packets over virtual devices like VRF or ipvlan —the function falls through its switch statement and triggers a spurious WARN_ON_ONCE(1) . Since non-INET...

The vulnerability of the sk_mc_loop() function in the net/core/sock.c module exposes the support for networking functions in the Linux kernel, allowing attackers to compromise the confidentiality, integrity, and accessibility of protected information.

The vulnerability of the skmcloop function in the net/core/sock.c module related to Linux kernel network functions is associated with improper disabling or release of resources. Exploiting this vulnerability can allow an attacker to compromise the confidentiality, integrity, and accessibility of...

Unity Linux 20.1050e / 20.1070e Security Update: kernel (UTSA-2026-011190)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011190 advisory. In the Linux kernel, the following vulnerability has been resolved: net: read sk-skfamily once in skmcloop syzbot is playing with IPV6ADDRFORM quite a lot these days...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-992755)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-992755 advisory. In the Linux kernel, the following vulnerability has been resolved: ipvlan: Dont Use skb-sk in ipvlanprocessv4,6outbound Raw packet from PFPACKET socket ontop of an...

CVE-2023-53831

A data race was found in the Linux kernel's networking stack. The skmcloop function reads sk-skfamily without proper synchronization while another thread may be changing it via IPV6ADDRFORM socket option. This race can cause the function to take an unexpected code path, triggering a WARNONONCE or...

SUSE CVE-2023-53831

In the Linux kernel, the following vulnerability has been resolved: net: read sk-skfamily once in skmcloop syzbot is playing with IPV6ADDRFORM quite a lot these days, and managed to hit the WARNONONCE1 in skmcloop We have many more similar issues to fix. WARNING: CPU: 1 PID: 1593 at...

EUVD-2023-60165

In the Linux kernel, the following vulnerability has been resolved: net: read sk-skfamily once in skmcloop syzbot is playing with IPV6ADDRFORM quite a lot these days, and managed to hit the WARNONONCE1 in skmcloop We have many more similar issues to fix. WARNING: CPU: 1 PID: 1593 at...

CVE-2023-53831

In the Linux kernel, the following vulnerability has been resolved: net: read sk-skfamily once in skmcloop syzbot is playing with IPV6ADDRFORM quite a lot these days, and managed to hit the WARNONONCE1 in skmcloop We have many more similar issues to fix. WARNING: CPU: 1 PID: 1593 at...

UBUNTU-CVE-2023-53831

In the Linux kernel, the following vulnerability has been resolved: net: read sk-skfamily once in skmcloop syzbot is playing with IPV6ADDRFORM quite a lot these days, and managed to hit the WARNONONCE1 in skmcloop We have many more similar issues to fix. WARNING: CPU: 1 PID: 1593 at...

CVE-2023-53831 net: read sk->sk_family once in sk_mc_loop()

In the Linux kernel, the following vulnerability has been resolved: net: read sk-skfamily once in skmcloop syzbot is playing with IPV6ADDRFORM quite a lot these days, and managed to hit the WARNONONCE1 in skmcloop We have many more similar issues to fix. WARNING: CPU: 1 PID: 1593 at...

CVE-2023-53831

In the Linux kernel, the following vulnerability has been resolved: net: read sk-skfamily once in skmcloop syzbot is playing with IPV6ADDRFORM quite a lot these days, and managed to hit the WARNONONCE1 in skmcloop We have many more similar issues to fix. WARNING: CPU: 1 PID: 1593 at...

kernel: ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound

In the Linux kernel, the following vulnerability has been resolved: ipvlan: Dont Use skb-sk in ipvlanprocessv4,6outbound Raw packet from PFPACKET socket ontop of an IPv6-backed ipvlan device will hit WARNONONCE in skmcloop through schdirectxmit path. WARNING: CPU: 2 PID: 0 at net/core/sock.c:775...

CVE-2024-33621

In the Linux kernel, the following vulnerability has been resolved: ipvlan: Dont Use skb-sk in ipvlanprocessv4,6outbound Raw packet from PFPACKET socket ontop of an IPv6-backed ipvlan device will hit WARNONONCE in skmcloop through schdirectxmit path. WARNING: CPU: 2 PID: 0 at net/core/sock.c:775...