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CVE-2026-74744: Linux

9.8

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 по мрежата, без особени условия, без вход и без действие от потребителя.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: ipvlan: inherit needed_headroom and needed_tailroom from phy_dev ipvlan devices inherit hard_header_len from phy_dev during ipvlan_init(), but leave needed_headroom and needed_tailroom set to 0. When the underlying phy_dev (or stacked lower device) requires extra headroom or tailroom for headers/trailers (e.g. macsec, ipsec, wireguard, tunnels, or veth with rx headroom), upper layers calculating packet headroom and tailroom fail to reserve sufficient space. This can result in reallocation overhead, skb headroom underflows, or KASAN slab-use-after-free crashes when dev_hard_header() / ipvlan_hard_header() prepends header data or when lower devices append tailroom. Fix this by: 1. Inheriting needed_headroom and needed_tailroom from phy_dev in ipvlan_init(). 2. Propagating needed_headroom and needed_tailroom updates to attached ipvlans in ipvlan_device_event() when receiving NETDEV_FEAT_CHANGE events.

Засегнати продукти

  • Linux Linux: 2ad7bf3638411cb547f2823df08166c13ab04269 преди af602c4d0ee548da18e2409b4b4da1079625a372; 2ad7bf3638411cb547f2823df08166c13ab04269 преди f3c17ff65f54781cde696e16a6c577615ed735aa; 2ad7bf3638411cb547f2823df08166c13ab04269 преди c0fbe31f6b20ade0465130685859faa5c86fda59; 2ad7bf3638411cb547f2823df08166c13ab04269 преди 5f33188457bbcc1b11ca87084037963c516ed3d9; 2ad7bf3638411cb547f2823df08166c13ab04269 преди 5c2ca77212eb38559b0353b8363b7a84f4b019dd; 2ad7bf3638411cb547f2823df08166c13ab04269 преди e16e960d55a40d36bd7c2494cc005e757dc9a1ef
  • Linux Linux: 3.19; преди 3.19; 6.1.184 до 6.1.*; 6.6.153 до 6.6.*; 6.12.105 до 6.12.*; 6.18.46 до 6.18.*; 7.1.10 до 7.1.*; от 7.2 нататък

История

  • 26 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74744: Linux | freedomonline.bg