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CVE-2026-98037: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: bpf: Reject untrusted allocated-object pointers When the final RCU read-side critical section ends, a local kptr is demoted to PTR_UNTRUSTED but retains MEM_ALLOC. The pointer may be NULL or may refer to an object whose lifetime is no longer protected. type_is_ptr_alloc_obj() nevertheless recognizes any PTR_TO_BTF_ID with MEM_ALLOC as a live allocated object. In particular, a refcount-only local kptr never carries NON_OWN_REF, so it still passes the bpf_refcount_acquire() argument check after RCU protection ends. The kfunc can then dereference NULL or stale memory. Make type_is_ptr_alloc_obj() reject PTR_UNTRUSTED pointers. Since type_is_non_owning_ref() is based on the same predicate, graph kfunc arguments obey the same live-object requirement. Fault-protected reads of the demoted pointer remain valid: writes are already rejected, and read fixups use bpf_may_fault_on_deref() rather than this predicate. [ kkd: Rewrote commit log ]

    Засегнати продукти

    • Linux Linux: 1b12171533a9bb23cf6fba7262b479028b65e1e8 преди 092c2874dc1b2060fa77a465a971acd4fdf87683; 1b12171533a9bb23cf6fba7262b479028b65e1e8 преди 135d542b97fa93e32c457d49d6e7b33ca7d05bae; 1b12171533a9bb23cf6fba7262b479028b65e1e8 преди 6b1f786ad85a0b63393b76f5e634deab1a73198c; 1b12171533a9bb23cf6fba7262b479028b65e1e8 преди 7441ee8276641bddaf1cba7bb75ef9c1458ceb3b
    • Linux Linux: 6.8; преди 6.8; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98037: Linux | freedomonline.bg