Към съдържанието
Търсене

CVE-2026-74667: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: net/packet: reset the MAC header on the packet-socket transmit path packet_parse_headers() resets the MAC header only for a SOCK_RAW frame whose socket did not bind a protocol. A protocol-bound SOCK_RAW socket, any SOCK_DGRAM frame, and the legacy SOCK_PACKET path therefore leave skb->mac_header unset here. For frames sent via __dev_queue_xmit() this is harmless: it resets the MAC header unconditionally. But the packet-socket PACKET_QDISC_BYPASS path uses dev_direct_xmit(), which does not, so the frame reaches ndo_start_xmit() with the MAC header unset. A driver that reads eth_hdr(skb) on transmit then dereferences skb->head + (u16)~0, an out-of-bounds access ~64 KiB past the head -- the same class fixed for one consumer in commit f5089008f90c ("macsec: do not read an unset MAC header in macsec_encrypt()"). packet_parse_headers() runs only on the transmit path, where skb->data points at the start of the L2 header for every packet-socket type regardless of its length: SOCK_RAW and SOCK_PACKET carry a user-supplied header and SOCK_DGRAM has one built by dev_hard_header(). Reset the MAC header unconditionally, mirroring __dev_queue_xmit(), so the frame is anchored on the bypass path too. Found by 0sec (https://0sec.ai) using automated source analysis; verified against source and matched to the macsec KASAN report in f5089008f90c. Compile-tested.

Засегнати продукти

  • Linux Linux: 75c65772c3d18447d62d3aca5f91b06c16cc25e4 преди 1e43a1d66615f411d427f9df1f46dd049d9e3681; 75c65772c3d18447d62d3aca5f91b06c16cc25e4 преди 4057853a91fb796c4f47c7d1baf1aa085394148e; 75c65772c3d18447d62d3aca5f91b06c16cc25e4 преди 2610ed4e86a4590234a9d70518c469751c5af231; 75c65772c3d18447d62d3aca5f91b06c16cc25e4 преди b47ba8fe6e1d2df8c92048de5afafd059447dc30; 75c65772c3d18447d62d3aca5f91b06c16cc25e4 преди 284f3e7a3f1a743fdf89e304fd1f19d5ffcff46d; 75c65772c3d18447d62d3aca5f91b06c16cc25e4 преди 971aa7d99242bbf09513e27b7a243f0b29ff23ae; 75c65772c3d18447d62d3aca5f91b06c16cc25e4 преди fdd4d7d52358a58e351dd9d82530c04eba8ccd7a; 75c65772c3d18447d62d3aca5f91b06c16cc25e4 преди c2707480cfbf19c7619acc9c089d17f20869821f
  • Linux Linux: 5.1; преди 5.1; 5.10.265 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.152 до 6.6.*; 6.12.104 до 6.12.*; 6.18.45 до 6.18.*; 7.1.9 до 7.1.*; от 7.2 нататък

История

  • 22 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74667: Linux | freedomonline.bg