CVE-2026-98816
2026-10-18
16h17 +00:00
16h17 +00:00
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Tetap terinformasi tentang perubahan untuk CVE tertentu.
Deskripsi CVE
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix overflow of jump offset in constant blinding
bpf_jit_blind_insn() rewrites 'if rX op imm goto off' into:
AX = imm ^ rnd
AX ^= rnd
if rX op AX goto off
and subtracts 2 from off when the jump is backward. off is s16, so
-32767 and -32768 wrap and the jump goes 32767 insns forward, past the
end of the prog. The jump is inside the patch, hence bpf_adj_branches()
doesn't check it. The kernel crashes when such prog runs with
bpf_jit_harden=2.
Return -ERANGE in such case. bpf_jit_blind_constants() fails the same
way when blinding of other insns moves a jump out of range.
