CVE-2026-53131 netfilter: require Ethernet MAC header before using eth_hdr()

In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using ethhdr ip6teui64, xtmac, the bitmap:ip,mac, hash:ip,mac, and hash:mac ipset types, and nflogsyslog access ethhdrskb after either assuming that the skb is associated with an...

CVE-2026-53131

In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using ethhdr ip6teui64, xtmac, the bitmap:ip,mac, hash:ip,mac, and hash:mac ipset types, and nflogsyslog access ethhdrskb after either assuming that the skb is associated with an...

CVE-2026-53131

In CVE-2026-53131, multiple netfilter-related paths in the Linux kernel (including ip6t_eui64, xt_mac, and several ipset types) could access Ethernet MAC header data via eth_hdr(skb) without first verifying that the skb is associated with an Ethernet device or that the MAC header is present and l...

CVE-2026-53131

In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using ethhdr ip6teui64, xtmac, the bitmap:ip,mac, hash:ip,mac, and hash:mac ipset types, and nflogsyslog access ethhdrskb after either assuming that the skb is associated with an...

PT-2026-52227

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description In the netfilter component, several modules access the eth hdrskb function without properly verifying that the socket buffer skb is associated with an Ethernet device or that a valid MAC...

CVE-2026-52942

A flaw was found in the Linux kernel's netfilter logging component. This vulnerability occurs because the system does not properly check if a network packet's Media Access Control MAC header is valid before attempting to log it. A local attacker could send a specially crafted network packet,...

PT-2026-51968

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the bpf prog test run skb function where the system may access ip hdrskb or ipv6 hdrskb even if the provided test input contains only an Ethernet header. This occurs...

CVE-2026-46321

In the Linux kernel, the following vulnerability has been resolved: tun: free page on short-frame rejection in tunxdpone tunxdpone returns -EINVAL on a frame shorter than ETHHLEN without freeing the page that vhostnetbuildxdp allocated for it. tunsendmsg discards that -EINVAL and still returns...

CVE-2026-46320 tap: free page on error paths in tap_get_user_xdp()

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

kernel: netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: account for Ethernet header in nfflowpppoeproto syzbot found a potential access to uninit-value in nfflowpppoeproto Blamed commit forgot the Ethernet header. BUG: KMSAN: uninit-value in...

kernel: netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: account for Ethernet header in nfflowpppoeproto syzbot found a potential access to uninit-value in nfflowpppoeproto Blamed commit forgot the Ethernet header. BUG: KMSAN: uninit-value in...

ALSA-2026:18587 Moderate: kernel security update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: bonding: check xdp prog when set bond mode CVE-2025-22105 kernel: block: fix resource leak in blkregisterqueue error path CVE-2025-37980 kernel: dmaengine: idxd: fix memory leak in error...

CVE-2026-31685

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6teui64: reject invalid MAC header for all packets eui64mt6 derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source address. The existing guard only rejects ...

CVE-2026-31685 netfilter: ip6t_eui64: reject invalid MAC header for all packets

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6teui64: reject invalid MAC header for all packets eui64mt6 derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source address. The existing guard only rejects ...

EUVD-2026-25652

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6teui64: reject invalid MAC header for all packets eui64mt6 derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source address. The existing guard only rejects ...

CVE-2026-31685 netfilter: ip6t_eui64: reject invalid MAC header for all packets

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6teui64: reject invalid MAC header for all packets eui64mt6 derives a modified EUI-64 from the Ethernet source address and compares it with the low 64 bits of the IPv6 source address. The existing guard only rejects ...

netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto()

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Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990478)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990478 advisory. In the Linux kernel, the following vulnerability has been resolved: llc: verify mac len before reading mac header LLC reads the mac header with ethhdr without...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990239)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990239 advisory. In the Linux kernel, the following vulnerability has been resolved: tap: add missing verification for short frame The cited commit missed to check against the validi...

Unity Linux 20.1070e Security Update: kernel (UTSA-2025-989975)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-989975 advisory. In the Linux kernel, the following vulnerability has been resolved: tun: add missing verification for short frame The cited commit missed to check against the validi...