CVE-2026-64361

In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length check_and_correct_requested_length() compares (off + len) against node_size using u32 arithmetic. When the caller passes a large len value (e.g. from an underflowed subtraction in hfs_brec_remove()), off + len can wrap past 2^32 and produce a small result, causing the bounds check to pass when it should fail. For example, with off=14 and len=0xFFFFFFF2 (underflowed from data_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6, which is less than a typical node_size of 512, so the check passes and the subsequent memmove reads ~4GB past the node buffer. Fix this by widening the addition to u64 before comparing against node_size. This prevents the u32 wrap while keeping the logic straightforward.

• linux linux kernel (>= 5.4.297 < 5.5) • linux linux kernel (>= 5.10.241 < 5.10.261) • linux linux kernel (>= 5.15.190 < 5.15.212) • linux linux kernel (>= 6.1.149 < 6.1.178) • linux linux kernel (>= 6.6.103 < 6.6.145) • linux linux kernel (>= 6.12.43 < 6.12.97) • linux linux kernel (>= 6.15.11 < 6.16) • linux linux kernel (>= 6.16.2 < 6.18.40) • linux linux kernel (>= 6.19 < 7.1.4)