kernel: pppoe: reload header pointer after dev_hard_header()

A flaw was found in the Linux kernel's PPPoE Point-to-Point Protocol over Ethernet implementation. This vulnerability occurs because a pointer to network packet data is not updated after memory is reallocated, leading to the use of an outdated memory address. An attacker with local access could...

kernel: pppoe: reload header pointer after dev_hard_header()

A flaw was found in the Linux kernel's PPPoE Point-to-Point Protocol over Ethernet implementation. This vulnerability occurs because a pointer to network packet data is not updated after memory is reallocated, leading to the use of an outdated memory address. An attacker with local access could...

CVE-2026-68121

⚡ CVE-2026-68121 - PPPoEject Linux Kernel PPPoE Use-After-Free → Escalada de Privilegios Local Una vulnerabilidad de corrupción de memoria en el kernel de Linux en la ruta de transmisión PPPoE , causada por un puntero obsoleto a una cabecera skbuff después de que un callback de cabecera de...

The vulnerability of the dev_hard_header() function in the PPPoE network driver of the Linux operating system allows a hacker to increase their privileges.

The vulnerability of the devhardheader function in the PPPoE network driver of the Linux operating system is related to the pointer being dereferenced after its expiration time. Exploiting this vulnerability can allow an attacker to gain increased privileges...

PPPoEject

PPPoEject CVE-2026-68121 Writeup !WARNING El PoC se proporciona únicamente para ayudar a defensores, mantenedores y equipos de seguridad autorizados a validar parches, mitigaciones, detecciones y exposición en sistemas que poseen o están explícitamente autorizados a probar. Usted es el único...

Important: kernel-livepatch-6.1.180-225.360

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after devhardheader CVE-2026-68121 In the Linux kernel, the following vulnerability has been resolved: sctp: prevent peer transport count overflow CVE-2026-74469 In the Linux kernel, t...

Important: kernel-livepatch-6.1.176-221.360

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after devhardheader CVE-2026-68121 In the Linux kernel, the following vulnerability has been resolved: sctp: prevent peer transport count overflow CVE-2026-74469 In the Linux kernel, t...

CVE-2026-74743 macvlan: inherit needed_headroom and needed_tailroom from lowerdev

In the Linux kernel, the following vulnerability has been resolved: macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying lowerdev requires...

SUSE CVE-2026-68121

In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after devhardheader pppoesendmsg saves a pointer to the PPPoE header before calling devhardheader. Device header callbacks are allowed to reallocate the skb head, invalidating pointers into it. This c...

pppoe: reload header pointer after dev_hard_header()

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CVE-2026-68121

In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after devhardheader pppoesendmsg saves a pointer to the PPPoE header before calling devhardheader. Device header callbacks are allowed to reallocate the skb head, invalidating pointers into it. This c...

CVE-2026-68121 pppoe: reload header pointer after dev_hard_header()

In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after devhardheader pppoesendmsg saves a pointer to the PPPoE header before calling devhardheader. Device header callbacks are allowed to reallocate the skb head, invalidating pointers into it. This c...