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CVE-2026-31684: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: net: sched: act_csum: validate nested VLAN headers tcf_csum_act() walks nested VLAN headers directly from skb->data when an skb still carries in-payload VLAN tags. The current code reads vlan->h_vlan_encapsulated_proto and then pulls VLAN_HLEN bytes without first ensuring that the full VLAN header is present in the linear area. If only part of an inner VLAN header is linearized, accessing h_vlan_encapsulated_proto reads past the linear area, and the following skb_pull(VLAN_HLEN) may violate skb invariants. Fix this by requiring pskb_may_pull(skb, VLAN_HLEN) before accessing and pulling each nested VLAN header. If the header still is not fully available, drop the packet through the existing error path.

    Засегнати продукти

    • Linux Linux: 2ecba2d1e45b24620a7c3df9531895cf68d5dec6 преди 0410c619e86551677fb79887a38eccad3f5a0725; 2ecba2d1e45b24620a7c3df9531895cf68d5dec6 преди 886469b6455611a511aa6013e957e15e50577513; 2ecba2d1e45b24620a7c3df9531895cf68d5dec6 преди 46c07ad50fa2f4ba7663ee1b72b75ad7ad45cf09; 2ecba2d1e45b24620a7c3df9531895cf68d5dec6 преди eb3765b90eb8f2a3d6310a80c14a9e57ec4267a2; 2ecba2d1e45b24620a7c3df9531895cf68d5dec6 преди a69738efea0996d05a3c7d2178551b891744df1b; 2ecba2d1e45b24620a7c3df9531895cf68d5dec6 преди ec4930979b3f7bbeb7af5744599fc6603a4dba62; 2ecba2d1e45b24620a7c3df9531895cf68d5dec6 преди 3d165d975305cf76ff0b10a3c798fb31e5f5f9a5; 2ecba2d1e45b24620a7c3df9531895cf68d5dec6 преди c842743d073bdd683606cb414eb0ca84465dd834; 3764bfae5056e95617b6ee074129297e11710886; 4.19.99 преди 4.20
    • Linux Linux: 5.1; преди 5.1; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.136 до 6.6.*; 6.12.83 до 6.12.*; 6.18.24 до 6.18.*; 6.19.14 до 6.19.*; от 7.0 нататък

    История

    • 25 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-31684: Linux | freedomonline.bg