UBUNTU-CVE-2026-74561

In the Linux kernel, the following vulnerability has been resolved: nexthop: avoid unlocked f6ilist walk in nhrtcacheflush nhrtcacheflush walks nh-f6ilist during an RTNL-serialized nexthop replace without holding nh-lock, racing the unlocked IPv6 route add/delete that mutate the list under nh-loc...

UBUNTU-CVE-2026-74562

In the Linux kernel, the following vulnerability has been resolved: nexthop: take nh-lock for f6ilist walks in replace check and notify fib6checknhlist and nexthopreplacenotify walk nh-f6ilist during an RTNL-serialized nexthop replace without holding nh-lock. IPv6 RTMNEWROUTE/RTMDELROUTE run...

CVE-2026-74543

In the Linux kernel, the following vulnerability has been resolved: net: udptunnel: fix memory leak in udptunnelnicunregister syzbot reported a memory leak 1 in the UDP tunnel NIC offload code. When device registration fails e.g. in registernetdevice, netdev core unwinds by sending a single...

CVE-2026-74562 nexthop: take nh->lock for f6i_list walks in replace check and notify

In the Linux kernel, the following vulnerability has been resolved: nexthop: take nh-lock for f6ilist walks in replace check and notify fib6checknhlist and nexthopreplacenotify walk nh-f6ilist during an RTNL-serialized nexthop replace without holding nh-lock. IPv6 RTMNEWROUTE/RTMDELROUTE run...

CVE-2026-74543 net: udp_tunnel: fix memory leak in udp_tunnel_nic_unregister()

In the Linux kernel, the following vulnerability has been resolved: net: udptunnel: fix memory leak in udptunnelnicunregister syzbot reported a memory leak 1 in the UDP tunnel NIC offload code. When device registration fails e.g. in registernetdevice, netdev core unwinds by sending a single...

CVE-2026-74543 net: udp_tunnel: fix memory leak in udp_tunnel_nic_unregister()

In the Linux kernel, the following vulnerability has been resolved: net: udptunnel: fix memory leak in udptunnelnicunregister syzbot reported a memory leak 1 in the UDP tunnel NIC offload code. When device registration fails e.g. in registernetdevice, netdev core unwinds by sending a single...

CVE-2026-74543

CVE-2026-74543 concerns the Linux kernel UDP tunnel NIC offload code. The issue: when device registration fails, the code may leak a struct udp_tunnel_nic due to an early return if utn->work_pending is set, because no subsequent NETDEV_UNREGISTER rebroadcast occurs. The fix, as described in co...

EUVD-2026-59736

In the Linux kernel, the following vulnerability has been resolved: net: udptunnel: fix memory leak in udptunnelnicunregister syzbot reported a memory leak 1 in the UDP tunnel NIC offload code. When device registration fails e.g. in registernetdevice, netdev core unwinds by sending a single...

CVE-2026-72054 net: ip_vti: require CAP_NET_ADMIN in the device netns for changelink

In the Linux kernel, the following vulnerability has been resolved: net: ipvti: require CAPNETADMIN in the device netns for changelink vtichangelink operates on at most two netns, devnetdev and the tunnel link netns t-net. They differ once the device is created in or moved to a netns other than t...

PT-2026-72995

In the Linux kernel, the following vulnerability has been resolved: net: udp tunnel: fix memory leak in udp tunnel nic unregister syzbot reported a memory leak 1 in the UDP tunnel NIC offload code. When device registration fails e.g. in register netdevice, netdev core unwinds by sending a single...

PT-2026-72314

In the Linux kernel, the following vulnerability has been resolved: can: isotp: fix use-after-free race with concurrent NETDEV UNREGISTER isotp release looked up the bound network device via dev get by index using the stored ifindex. During device unregistration the device is unlisted from the...

PT-2026-72599

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mxl862xx: fix use-after-free of DSA ports in crc err work Upon an MDIO CRC error mxl862xx crc err work fn walks the DSA ports and closes the CPU port conduits: dsa switch for each cpu portdp, priv-ds dev closedp-conduit...

PT-2026-73013

In the Linux kernel, the following vulnerability has been resolved: nexthop: avoid unlocked f6i list walk in nh rt cache flush nh rt cache flush walks nh-f6i list during an RTNL-serialized nexthop replace without holding nh-lock, racing the unlocked IPv6 route add/delete that mutate the list unde...

PT-2026-72975

In the Linux kernel, the following vulnerability has been resolved: qede: sync udp tunnel ports outside qede lock in the recovery path A TX timeout on a qede NIC that has VXLAN/GENEVE tunnel ports configured wedges the rtnetlink control plane of the whole machine: NETDEV WATCHDOG: ens6f1 qede:...

CVE-2026-68432

A flaw was found in the Linux kernel's VXLAN Virtual Extensible LAN implementation. A local attacker, with CAPNETADMIN network administration capability in one network namespace, could exploit an incorrect privilege check in the rtnl changelink path. This allows the attacker to modify the...

CVE-2026-68138

In the Linux kernel, the following vulnerability has been resolved: net/sched: serialize qdiscrtablist against concurrent get/put qdiscgetrtab and qdiscputrtab mutate the process-global singly linked list qdiscrtablist and a plain non-atomic 'int refcnt' with no lock. This was only safe because...

CVE-2026-63997

A flaw was found in the ethtool module of the Linux kernel. The moduleflashfwschedule function fails to properly undo the setting of the 'inprogress' flag and the taking of the netdev reference during module flash errors. This oversight can lead to a resource leak, preventing the device from bein...

CVE-2026-63997

In the Linux kernel, the following vulnerability has been resolved: ethtool: module: avoid leaking a netdev ref on module flash errors moduleflashfwschedule is missing undo for setting the "inprogress" flag and taking the netdev reference. Delay taking these, the device can't disappear while we a...

CVE-2026-63988 bridge: Fix sleep in atomic context in sysfs path

In the Linux kernel, the following vulnerability has been resolved: bridge: Fix sleep in atomic context in sysfs path Since the start of the git history, brportstore always acquired the bridge lock. Back then this decision made sense: The bridge lock protects the STP state of the bridge and its...

CVE-2026-46287

In the Linux kernel, the following vulnerability has been resolved: net: txgbe: fix RTNL assertion warning when remove module For the copper NIC with external PHY, the driver called phylinkconnectphy during probe and phylinkdisconnectphy during remove. It caused an RTNL assertion warning in...