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CVE-2026-72427: 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: bpf: Fix effective prog array index with BPF_F_PREORDER replace_effective_prog() and purge_effective_progs() located the slot in the effective array by walking the program hlist and counting entries linearly. That count does not match the array layout: compute_effective_ progs() places BPF_F_PREORDER programs at the front (ancestor cgroup first, attach order within a cgroup) and the rest after them (descendant cgroup first). So when a preorder program is present, the linear hlist position no longer equals the program's index in the effective array. For replace_effective_prog() (bpf_link_update()) this overwrote the wrong slot, corrupting the effective order. For purge_effective_progs(), it could dummy out a slot belonging to a different program and leave the detached program in the array while bpf_prog_put() drops its reference, i.e. a use-after-free. Fix both by replaying compute_effective_progs()'s placement (including the per-cgroup preorder reversal) in a shared effective_prog_pos() helper. Identify the entry by its struct bpf_prog_list pointer rather than by (prog, link) value, so the lookup resolves to exactly the attachment the syscall selected even when the same bpf_prog is attached to several cgroups in the hierarchy.

Засегнати продукти

  • Linux Linux: bc8023ef3b11410682e5d4990e05e5bc2d3e1c94 преди 525e408c27ae714e538b8c608c3a974df3ab6c92; 555c0b713ca83968d3c843cb15485b9ba3367b1b преди 41b4320b84fdafe1ab586b06453d30d50415db59; 4b82b181a26cff8bf7adc3a85a88d121d92edeaf преди 9697db03e010391c55ae75192cbdf30c5a72c114; 4b82b181a26cff8bf7adc3a85a88d121d92edeaf преди b584f107ab90222bd825dcb4c5977326ff684109; 4b82b181a26cff8bf7adc3a85a88d121d92edeaf преди f08aaee3152d0dfc578b3f2586932d82062701dd; 4707ad649cf662add3058bff47430817811b048d; 6.6.93 преди 6.6.145; 6.12.31 преди 6.12.97; 6.14.9 преди 6.15
  • Linux Linux: 6.15; преди 6.15; 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-2026-72427: Linux | freedomonline.bg