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.

A flaw was found in the Linux kernel's HFS/HFS+ filesystem driver. An integer overflow vulnerability exists in the `check_and_correct_requested_length` function, where a calculation involving `off + len` can wrap around due to 32-bit arithmetic. This allows an attacker to bypass bounds checks, leading to an out-of-bounds read of approximately 4GB of memory. A local attacker with low privileges could exploit this to potentially disclose sensitive information or cause memory corruption.

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-64361 https://nvd.nist.gov/vuln/detail/CVE-2026-64361 https://lore.kernel.org/linux-cve-announce/2026072520-CVE-2026-64361-e8bc@gregkh/T