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CVE-2026-74347: 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: cttimeout: detach dataplane timeout policy and repurpose refcount Add a refcount for struct nf_ct_timeout which is used by ct extension to set the custom ct timeout policy, this tells us that the ct timeout is being used by a conntrack entry. When the last conntrack entry drops the refcount on the ct timeout, the ct timeout is released. Remove the refcount for control plane which controls if the ruleset refers to the timeout policy. After this update, it is possible to remove the ct timeout policy from nfnetlink_cttimeout immediately. This is for simplicity not to handle two refcounts on a single object. Remove nf_queue_nf_hook_drop(): a packet sitting in nfqueue will just hold a reference to the nf_ct_timeout object until packet is reinjected, since this is part of the ct extension, this will be released by the time the conntrack is freed. nf_ct_untimeout() is still called to clean up in a best effort basis: the ct timeout on existing entries gets removed when the ct timeout goes away, but as long as the iptables ruleset still refers to the ct timeout through a template, new conntracks may keep attaching it and extend its lifetime until the rule is removed. nf_ct_untimeout() is not called anymore from module removal path, this is unlikely to find timeouts give module refcount is bumped, and the new refcount already tracks the ct timeout policy use so it is released when unused.

Засегнати продукти

  • Linux Linux: 50978462300f74dc48aea4a38471cb69bdf741a5 преди b512f4bacb73219bd525b5189a26143cabd7b38c; 50978462300f74dc48aea4a38471cb69bdf741a5 преди 1241e459a1bd17044fa6bbb68f491ab5543c3a1b; 50978462300f74dc48aea4a38471cb69bdf741a5 преди b2e84317f334d834fb06c9b340ea465f398b6d4f; 50978462300f74dc48aea4a38471cb69bdf741a5 преди 44583fd5735cb0bdf3bfe11b1e51504ce387bdb7; 50978462300f74dc48aea4a38471cb69bdf741a5 преди 9aeb0dcfeb460d33d61d434148b51103ab1d2013; 50978462300f74dc48aea4a38471cb69bdf741a5 преди 7d6a9cdb8d3a51d9cfe546a09a518ab3d2671549
  • Linux Linux: 3.4; преди 3.4; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.112 до 6.12.*; 6.18.53 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74347: Linux | freedomonline.bg