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CVE-2026-43501: Linux, грешка в паметта

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.

CVE радар: още уязвимости от този вид

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: reserve mac_len headroom when recompressed SRH grows ipv6_rpl_srh_rcv() decompresses an RFC 6554 Source Routing Header, swaps the next segment into ipv6_hdr->daddr, recompresses, then pulls the old header and pushes the new one plus the IPv6 header back. The recompressed header can be larger than the received one when the swap reduces the common-prefix length the segments share with daddr (CmprI=0, CmprE>0, seg[0][0] != daddr[0] gives the maximum +8 bytes). pskb_expand_head() was gated on segments_left == 0, so on earlier segments the push consumed unchecked headroom. Once skb_push() leaves fewer than skb->mac_len bytes in front of data, skb_mac_header_rebuild()'s call to: skb_set_mac_header(skb, -skb->mac_len); will store (data - head) - mac_len into the u16 mac_header field, which wraps to ~65530, and the following memmove() writes mac_len bytes ~64KiB past skb->head. A single AF_INET6/SOCK_RAW/IPV6_HDRINCL packet over lo with a two segment type-3 SRH (CmprI=0, CmprE=15) reaches headroom 8 after one pass; KASAN reports a 14-byte OOB write in ipv6_rthdr_rcv. Fix this by expanding the head whenever the remaining room is less than the push size plus mac_len, and request that much extra so the rebuilt MAC header fits afterwards.

Засегнати продукти

  • Linux Linux: 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 преди bde199c72d319a4e207f88daabc888317504e2fb; 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 преди be1fa0aa9b4fdd5a8b7a61ba520a690a68391e6e; 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 преди 0a9e8053f1f8a8e1bfc1dd61ffe67be6c1180402; 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 преди 8e8be63465a5e80394c70324603dfea1bfdad48f; 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 преди 4babc2d9fda2df43823b85d08a0180b68f1b0854; 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 преди c261d07a80576dc8ccf394ef8f074f8c67a06b37; 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 преди 7398ebefbfd4f8a31d4f665a4213302fa995494b; 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 преди 9e6bf146b55999a095bb14f73a843942456d1adc
  • Linux Linux: 5.7; преди 5.7; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.140 до 6.6.*; 6.12.86 до 6.12.*; 6.18.27 до 6.18.*; 7.0.4 до 7.0.*; от 7.1 нататък
  • Red Hat: още 9 продукта, добавени от Red Hat

    Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8

  • Siemens: още 3 продукта, добавени от Siemens

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Вид слабост

История

  • 21 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-43501: Linux, грешка в паметта | freedomonline.bg