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CVE-2026-74582: 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: packet: use consistent hard_header_len in non-ring send paths packet_snd() reads dev->hard_header_len multiple times while allocating and constructing an skb. Device reconfiguration can change this value concurrently, for example through bonding device type changes. For SOCK_RAW, packet_snd() can save a larger value in reserve and later allocate headroom using a smaller value. Moving skb->data back by reserve then places it before skb->head, and the following copy from userspace can attempt an out-of-bounds write. packet_sendmsg_spkt() has the same issue because it calculates its reservation and header offset from separate reads before dropping the RCU read lock to allocate the skb. Add LL_RESERVED_SPACE_EX() for callers that already saved a header length. Read hard_header_len once in packet_snd() and use it for allocation and construction. In packet_sendmsg_spkt(), preserve the allocation-time value through the device lookup retry. The separate SOCK_DGRAM consistency problem between hard_header_len and header_ops->create is not addressed here.

Засегнати продукти

  • Linux Linux: b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba преди bcd4df60ac9481b1ceffdfe5ec38fe51dcaae812; b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba преди 78a47127e33c340bc6d38dcc4552a094b4f5cc77; b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba преди 142e287b3a25cfe909215177c23243e7fc5ae2b1; b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba преди 91f041451f967cd87ed722a8f43c0b767a64f1a0; b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba преди 9052756290962ffb9a661bcf319e92dedaaedfed; b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba преди 5bb10753d428aadfc356a2bfe9acea09c82a62ec; b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba преди b06b6fce6d7deaf7238e09b48ce3b1125ff41acd; b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba преди 03390aa32e669cc4ecd7d34108e2e1afc13d689d; d9fb8cc230b2a4757e9fe4f81468f81212d4deaa; 6190cce26e40bf71c4d375b21eea74bb07b6a0f3; 01a658c1b9d4b5393c38d5a92d9112ab1425382a; 8809ae6747e760e6f1d2453ceb08c9bcc4939766; 4.4.133 преди 4.5; 4.9.103 преди 4.10; 4.14.44 преди 4.15; 4.16.12 преди 4.17
  • Linux Linux: 4.17; преди 4.17; 5.10.267 до 5.10.*; 5.15.218 до 5.15.*; 6.1.185 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

  • 21 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74582: Linux | freedomonline.bg