Към съдържанието
Търсене

CVE-2026-53036: 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, arm64: Fix off-by-one in check_imm signed range check check_imm(bits, imm) is used in the arm64 BPF JIT to verify that a branch displacement (in arm64 instruction units) fits into the signed N-bit immediate field of a B, B.cond or CBZ/CBNZ encoding before it is handed to the encoder. The macro currently tests for (imm > 0 && imm >> bits) || (imm < 0 && ~imm >> bits) which admits values in [-2^N, 2^N) — effectively a signed (N+1)-bit range. A signed N-bit field only holds [-2^(N-1), 2^(N-1)), so the check admits one extra bit of range on each side. In particular, for check_imm19(), values in [2^18, 2^19) slip past the check but do not fit into the 19-bit signed imm19 field of B.cond. aarch64_insn_encode_immediate() then masks the raw value into the 19-bit field, setting bit 18 (the sign bit) and flipping a forward branch into a backward one. Same class of issue exists for check_imm26() and the B/BL encoding. Shift by (bits - 1) instead of bits so the actual signed N-bit range is enforced.

    Засегнати продукти

    • Linux Linux: e54bcde3d69d40023ae77727213d14f920eb264a преди a5dfeb3b61065039488342d43ae06d4729d955d4; e54bcde3d69d40023ae77727213d14f920eb264a преди 7fd3b41260c6120e7b60164afea5d961af6224f9; e54bcde3d69d40023ae77727213d14f920eb264a преди 6927f0d6794aa73318bbfa929f1ff6065b0620df; e54bcde3d69d40023ae77727213d14f920eb264a преди 1a113b5497297871699cd498b1b83542e0db7f15; e54bcde3d69d40023ae77727213d14f920eb264a преди fb74defa1cca1a73177c0c761e641332e4f979a3; e54bcde3d69d40023ae77727213d14f920eb264a преди 1dd8be4ec722ce54e4cace59f3a4ba658111b3ec
    • Linux Linux: 3.18; преди 3.18; 6.1.175 до 6.1.*; 6.6.141 до 6.6.*; 6.12.91 до 6.12.*; 6.18.33 до 6.18.*; 7.0.10 до 7.0.*; от 7.1 нататък

    История

    • 24 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53036: Linux | freedomonline.bg