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CVE-2026-45859: Linux, отказ на услуга

7.5

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: netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'F_GSO' capability flag and a gso packet with an unconfirmed nf_conn entry is received all packets are now dropped instead of queued, because the check happens after skb_gso_segment(). In that case, we did have exclusive ownership of the skb and its associated conntrack entry. The elevated use count is due to skb_clone happening via skb_gso_segment(). Move the check so that its peformed vs. the aggregated packet. Then, annotate the individual segments except the first one so we can do a 2nd check at reinject time. For the normal case, where userspace does in-order reinjects, this avoids packet drops: first reinjected segment continues traversal and confirms entry, remaining segments observe the confirmed entry. While at it, simplify nf_ct_drop_unconfirmed(): We only care about unconfirmed entries with a refcnt > 1, there is no need to special-case dying entries. This only happens with UDP. With TCP, the only unconfirmed packet will be the TCP SYN, those aren't aggregated by GRO. Next patch adds a udpgro test case to cover this scenario.

Засегнати продукти

  • Linux Linux: 6dcc8ba8a6074bb79040f502dc66ad23a58a1c86 преди 4666688657e1054278b836b825fb88b2907e2da2; 74e6eb7fd27ef1ccc68041dbc66e6d80d2e4a1a0 преди aead84bdacd77e08357fd718e5dcaffaf387f3c3; 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb преди 79b713ef4261a8ead96af4703f89d0b5f25532e2; 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb преди 23901aa6b8a2f294c4b774436b4691f3ff863a8f; 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb преди b740e7ddd7ca0dbfeafca3f5e52717206cf28524; 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb преди 207b3ebacb6113acaaec0d171d5307032c690004; 6c4a0ba674f410ab99a30a16f32dac0ebfed5cd3; 025b3326c5c409b372d0103ad30f174e55adbd1b; 6.1.107 преди 6.1.191; 6.6.48 преди 6.6.160; 5.15.166 преди 5.16; 6.10.7 преди 6.11
  • Linux Linux: 6.11; преди 6.11; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.75 до 6.12.*; 6.18.14 до 6.18.*; 6.19.4 до 6.19.*; 7.0 до *

Вид слабост

История

  • 27 май 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-45859: Linux, отказ на услуга | freedomonline.bg