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CVE-2026-98568: Linux

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: vxlan: use one headroom snapshot for neighbour replies vxlan_na_create() samples LL_RESERVED_SPACE() to size the reply skb and then samples it again to reserve headroom. A concurrent vxlan_changelink() can update needed_headroom between the two reads, creating a TOCTOU race. The second value can exceed the allocation and make the Ethernet header write out of bounds. The race is reproducible on the unpatched kernel. It occurred when vxlan_na_create() generated a neighbour reply while vxlan_changelink() changed the link headroom. KASAN caught a four-byte write two bytes beyond a 704-byte skbuff_small_head allocation. Snapshot the headroom once and use that value for both allocation and reservation.

    Засегнати продукти

    • Linux Linux: 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa преди e3e24f4c434c56952412f875b834aa9daaa4fb15; 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa преди 9ed5a548b42d46e6968a46b67ca8a8e49b12a5a1; 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa преди fcaf456092dc86fd5b0b523ac27ec0d114066931; 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa преди 45a67662bf8ce3aa5643accf98d328dfbb47eaf6; 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa преди 315d42ca39f69846662961c25dcf2bb07c350d14; 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa преди a3c5eb6e382dd426a5e7eb08608897ed57167ff7; 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa преди ff022fd9d0f0282c575e11778b96bd1b637503eb; 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa преди 481506a756dcd828ef42391cb08f38d8d96d38fc; d8be18c52dbc94989f6d74637b731af39cd3d902; 3927dace523706cc00f808520eaf2125dd7c07b5; 3.12.18 преди 3.13; 3.13.10 преди 3.14
    • Linux Linux: 3.14; преди 3.14; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.158 до 6.6.*; 6.12.112 до 6.12.*; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; от 7.3 нататък

    История

    • 18 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98568: Linux | freedomonline.bg