Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: In the tunnels section, there’s no need to assume that the macheader is set when using skbtunnelcheckpmtu. The recently added debug in commit f9aefd6b2aa3 “net: warn if mac header was not set” identified a bug in...

Astra Linux – Vulnerability in Linux 5.10, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net: added vlangetprotocolanddepth helper. Previously, skbmaypull was used instead of skbheaderpointer in vlangetprotocol and related functions. Few calls relied on skb-head being populated with the MAC header. syzbot detected on...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: bonding: Do not assume that the skbmacheader is set. Drivers must not assume in their ndostartxmit function that skbs have their macheader set. skb-data is all that is needed. bonding seems to be one of the last vulnerabilitie...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ipvlan: Fixed bugs that occurred outside the bounds of the allowed values, caused by the absence of skb-macheader. If an AFPACKET socket is used to send packets through ipvlan, and the default xmit function of the AFPACKET socket...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15

In the Linux kernel, the following vulnerability has been resolved: net: nsh: Use the correct macoffset to unwind gso skb in nshgsosegment. As shown in the call trace, the skbpanic error occurred due to an incorrect skb-macheader in nshgsoSegment. Invalid opcode: 0000 1 PREEMPT SMP KASAN PTI CPU:...

kernel: netfilter: nf_log: validate MAC header was set before dumping it

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,...

kernel: netfilter: nf_log: validate MAC header was set before dumping it

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,...

SUSE CVE-2026-72019

In the Linux kernel, the following vulnerability has been resolved: macsec: don't read an unset MAC header in macsecencrypt macsecencrypt reads the Ethernet header via ethhdrskb skb-head + skb-macheader to memmove the 12 source/destination MAC bytes forward and make room for the SecTAG. On the...

kernel: netfilter: require Ethernet MAC header before using eth_hdr()

A flaw was found in the Linux kernel's netfilter component. Certain netfilter modules, including ip6teui64 and xtmac, accessed Ethernet MAC header data without first verifying that an Ethernet device was associated with the network packet or that the MAC header was present and of sufficient lengt...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098845)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098845 advisory. In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using ethhdr ip6teui64, xtmac, the bitmap:ip,mac,...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098988)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098988 advisory. In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6teui64: reject invalid MAC header for all packets eui64mt6 derives a modified EUI-6...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098990)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098990 advisory. In the Linux kernel, the following vulnerability has been resolved: netfilter: nflog: validate MAC header was set before dumping it The fallback path of dumpmacheade...

CVE-2026-74667

A flaw was found in the Linux kernel's networking packet handling. Specifically, the packetparseheaders function does not consistently reset the Media Access Control MAC header for certain packet types on the PACKETQDISCBYPASS path. This can lead to an unset MAC header, causing a driver to perfor...

SUSE CVE-2026-74667

In the Linux kernel, the following vulnerability has been resolved: net/packet: reset the MAC header on the packet-socket transmit path packetparseheaders resets the MAC header only for a SOCKRAW frame whose socket did not bind a protocol. A protocol-bound SOCKRAW socket, any SOCKDGRAM frame, and...

CVE-2026-74667

In the Linux kernel, the following vulnerability has been resolved: net/packet: reset the MAC header on the packet-socket transmit path packetparseheaders resets the MAC header only for a SOCKRAW frame whose socket did not bind a protocol. A protocol-bound SOCKRAW socket, any SOCKDGRAM frame, and...

AZL-97127 CVE-2026-74667 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: net/packet: reset the MAC header on the packet-socket transmit path packetparseheaders resets the MAC header only for a SOCKRAW frame whose socket did not bind a protocol. A protocol-bound SOCKRAW socket, any SOCKDGRAM frame, and...

CVE-2026-74667

In the Linux kernel, the following vulnerability has been resolved: net/packet: reset the MAC header on the packet-socket transmit path packetparseheaders resets the MAC header only for a SOCKRAW frame whose socket did not bind a protocol. A protocol-bound SOCKRAW socket, any SOCKDGRAM frame, and...

UBUNTU-CVE-2026-74667

In the Linux kernel, the following vulnerability has been resolved: net/packet: reset the MAC header on the packet-socket transmit path packetparseheaders resets the MAC header only for a SOCKRAW frame whose socket did not bind a protocol. A protocol-bound SOCKRAW socket, any SOCKDGRAM frame, and...

CVE-2026-74667 net/packet: reset the MAC header on the packet-socket transmit path

In the Linux kernel, the following vulnerability has been resolved: net/packet: reset the MAC header on the packet-socket transmit path packetparseheaders resets the MAC header only for a SOCKRAW frame whose socket did not bind a protocol. A protocol-bound SOCKRAW socket, any SOCKDGRAM frame, and...

CVE-2026-74667

CVE-2026-74667 is an out-of-bounds read in the Linux kernel's net/packet subsystem. The packet_parse_headers() function fails to reset skb->mac_header for protocol-bound SOCK_RAW sockets, SOCK_DGRAM frames, and the legacy SOCK_PACKET path. When these frames traverse the PACKET_QDISC_BYPASS tra...