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CVE-2026-90359: 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 >8 byte return values on return-reading trampoline paths btf_distill_func_proto() builds the function model used for the fentry/fexit/fmod_ret/fsession trampolines and struct_ops. It has accepted a 16-byte __int128 return value since the trampoline was introduced: __get_type_size() returns the integer's type size, and the return-type check only rejected ret < 0. But the BPF trampoline preserves only 8 bytes of the return value (RAX on x86, i.e. R0). For an attach type that reads the target's return value the second half (RDX / R3) is neither saved nor restored, so a program attached to a function returning a 16-byte value corrupts the value seen by the real caller and itself observes only half of it. struct_ops trampolines have the same limitation. This affects the attach types that read the target's return value: fexit, fmod_ret and fsession (plus the _multi variants of fexit and fsession), and struct_ops. fentry/fentry_multi run before the target returns and are unaffected. Reject a >8 byte return value for these attach types in bpf_check_attach_target() and bpf_check_attach_btf_id_multi(), and for struct_ops in bpf_struct_ops_desc_init().

    Засегнати продукти

    • Linux Linux: fec56f5890d93fc2ed74166c397dc186b1c25951 преди de54ba33690d2dd3c4aa686c9693505644285b0b; fec56f5890d93fc2ed74166c397dc186b1c25951 преди 9a9e902bd0556052534641f7d5f868c6dc4b84ae; fec56f5890d93fc2ed74166c397dc186b1c25951 преди d36ac53fc83baf843c51b7afd6d2471f36b713d8; fec56f5890d93fc2ed74166c397dc186b1c25951 преди c48796aa6c392cde93946e5d5a9a1f1b1cf72feb
    • Linux Linux: 5.5; преди 5.5; 6.12.114 до 6.12.*; 6.18.57 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-2026-90359: Linux | freedomonline.bg