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CVE-2026-72250: Linux

7.8

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 локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_reasm: guard mac_header adjustment after IPv6 defrag nf_ct_frag6_reasm() slides the packet head forward to drop the IPv6 fragment header and then unconditionally advances skb->mac_header: skb->mac_header += sizeof(struct frag_hdr); On the NF_INET_LOCAL_OUT defrag path the skb has no link-layer header yet, so skb->mac_header is still the "not set" sentinel (u16)~0U. Adding sizeof(struct frag_hdr) wraps it to a small value (0xffff + 8 == 7), after which skb_mac_header_was_set() wrongly reports a MAC header is present and skb_mac_header() points into the headroom. The reassembler has done this unconditional add since it was introduced; it was harmless while mac_header was a bare pointer, but wrong once mac_header became a u16 offset whose unset state is the ~0U sentinel tested by skb_mac_header_was_set(). The sibling net/ipv6/reassembly.c does the same relocation and does guard the adjustment; mirror the guard here.

Засегнати продукти

  • Linux Linux: 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 преди 6e8cd710ca35c576f5f2e5a396047c9ac61f75e5; 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 преди 2a95ec21824a8ad81ad660b12231456fc0ac9830; 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 преди bbcdef2061b170af45702ce6b359c02c12acfc94; 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 преди cd0d7bbc027b4d3329712cdcdeb4e5567ffd0d58; 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 преди 53ef70a315420ed31581d38343684b3bf9a3c76d; 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 преди a58230f3a7c4f6c3261786bc1efb72c42e68cd25; 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 преди 00bdce2fda7e430d24cfbc96764a1b96deb31f82; 9fb9cbb1082d6b31fb45aa1a14432449a0df6cf1 преди 3b08fed5b7e0d5e3a25d73ef3ba09cd33ade16c9
  • Linux Linux: 2.6.15; преди 2.6.15; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-72250: Linux | freedomonline.bg