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CVE-2026-98096: Linux

7.4

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

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Време до експлоатация

Атакува се по мрежата, при специфични условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: restore network header before routing and forwarding ipv6_srh_rcv() runs with skb->data at the Segment Routing Header (SRH) while skb_network_header() points at the IPv6 header. When segments_left > 0, ipv6_srh_rcv() previously restored the skb->data position by pushing sizeof(struct ipv6hdr), assuming the SRH immediately followed the fixed IPv6 header. If another extension header (such as a Hop-by-Hop options header) precedes the SRH, skb_network_offset() remained negative. This led to two problems: 1. During ip6_route_input(), fib6_rules_early_flow_dissect() invokes __skb_flow_dissect() which passes the negative skb_network_offset() to flow dissection, breaking BPF and C flow dissector logic. 2. If forwarded via ip6_forward() or redirected via act_mirred, downstream handlers (like sch_fragment() or neighbour output) pass the negative offset as an unsigned length, triggering OOB memcpy or buffer overflows. Fix this by pushing -skb_network_offset(skb) before routing, ensuring skb_network_offset(skb) is 0 for route lookup / flow dissection as well as downstream forwarding. On the loopback path, pull skb_transport_offset(skb) to restore skb->data to the SRH before looping back.

    Засегнати продукти

    • Linux Linux: 1ababeba4a21f3dba3da3523c670b207fb2feb62 преди f463c4786cf27376de7dfc0833a12e924a98f698; 1ababeba4a21f3dba3da3523c670b207fb2feb62 преди 8f44d4160bcdb3136a9145a4b9c7816382976925; 1ababeba4a21f3dba3da3523c670b207fb2feb62 преди 9cfbe2c381ab6d00a08e7a5b6028865adfb4e1bc; 1ababeba4a21f3dba3da3523c670b207fb2feb62 преди af08f62b5a5a446d6134a92d86771d3d12e0e3da; 1ababeba4a21f3dba3da3523c670b207fb2feb62 преди ce4c8beedc19aceeab0e7bdc6f34394fb158c47c; 1ababeba4a21f3dba3da3523c670b207fb2feb62 преди 97b21ef57dfabbff660a4672c9fef7edfb720f47; 1ababeba4a21f3dba3da3523c670b207fb2feb62 преди 3ad7dca5e03bd64c65983a19734337512fd75491; 1ababeba4a21f3dba3da3523c670b207fb2feb62 преди 975b5b067f525a1b1338c4a3bee1c46545801518
    • Linux Linux: 4.10; преди 4.10; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98096: Linux | freedomonline.bg