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CVE-2026-98573: 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: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6() skb_maybe_pull_tail() subtracts skb_headlen(skb) from the unsigned max argument and passes the result to __pskb_pull_tail() as a signed int. The function does not ensure that max is at least skb_headlen(skb). This can happen while parsing IPv6 extension headers when an skb already has a linear area larger than MAX_IPV6_HDR_LEN. Once the parser needs data beyond the linear area, max - skb_headlen(skb) wraps and is converted to a negative delta. __pskb_pull_tail() then passes that negative length to skb_copy_bits(), where it can become a very large copy length. Pass the requested length itself as the pull bound at the three extension-header call sites, so the delta can no longer go negative.

    Засегнати продукти

    • Linux Linux: 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 преди 9c4e432132a97b82edf28fa172c39f743e6bfb26; 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 преди 718747afa5463d9cc5fd9a09f03b2a492edd9b78; 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 преди a0ad0473c09d2e947aecac5c82e637ec85924b12; 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 преди b2da5ed3d8c75e1b729a21b6d3beaed415e263f6; 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 преди 6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b; 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 преди cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962; 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 преди d7f474226809471dc7877435e9c492cc914df0bf; 1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 преди 3b4e0b0c008a8c1b474730248cd5b873026c74bd
    • Linux Linux: 3.13; преди 3.13; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 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

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    Първоизточници

    CVE-2026-98573: Linux | freedomonline.bg