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CVE-2026-93138: 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.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: bpf: Fix vmlinux BTF prep race in bpf_get_btf_vmlinux bpf_get_btf_vmlinux() lazily parses the vmlinux BTF under the bpf_verifier_lock, but publishes the result through a plain store and re-checks it through a plain lockless load. Nothing orders the stores initializing the struct btf inside btf_parse_vmlinux() against the store publishing the pointer: On a weakly ordered arch, a concurrent first-time caller taking the lockless fast path could in principle observe the pointer before the parsed contents are visible. The mutex_unlock() does not help such a reader given it only synchronizes with a later acquisition of the same lock. Thus, publish the pointer with smp_store_release() and read it on the fast path with smp_load_acquire(). Acquire semantics are needed rather than a dependency-ordered READ_ONCE(): btf_parse_vmlinux() also populates globals outside the returned object (e.g. bpf_ctx_convert.t). An address dependency would only order accesses performed through the pointer and not cover other globals.

    Засегнати продукти

    • Linux Linux: 8580ac9404f6240668a026785d7d8856f0530409 преди f32a4a40bc635be25d6816da4bd91e9e58c31bf3; 8580ac9404f6240668a026785d7d8856f0530409 преди a7fe72d780122eb934536f1719abad445f6afdf7; 8580ac9404f6240668a026785d7d8856f0530409 преди e18a10b39c994f04e1ebd7f8fc042bb1ca8ad053; 8580ac9404f6240668a026785d7d8856f0530409 преди 978524ecfc1c539282df5858de1eec20748c6f74; 8580ac9404f6240668a026785d7d8856f0530409 преди eaf302628a78806f66d8224d6ba03fb4d5025de4; 8580ac9404f6240668a026785d7d8856f0530409 преди 2892f3f44bf865c8fb6b6c0960edec4cc91806ee; 8580ac9404f6240668a026785d7d8856f0530409 преди 86d11c594d60b255b526fa5260f669463fb1a063; 8580ac9404f6240668a026785d7d8856f0530409 преди 92863e678070f57c17c868e4bfa2441a5c61ad2b
    • Linux Linux: 5.5; преди 5.5; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-93138: Linux | freedomonline.bg