PT-2026-64581 · Linux · Linux

CVE-2026-64360 · Published 2026-07-25 · Updated 2026-07-25

Mitre

In the Linux kernel, the following vulnerability has been resolved:

hfs/hfsplus: zero-initialize buffer in hfs bnode read

hfs bnode read() can return early without writing to the output buffer when is bnode offset valid() fails or when check and correct requested length() corrects the length to zero. Callers such as hfs bnode read u16() and hfs bnode read u8() pass stack-allocated buffers and use the result unconditionally, leading to KMSAN uninit-value reports.

Rather than initializing at each individual call site, zero the buffer at the start of hfs bnode read() before any validation checks. This ensures all callers in both hfs and hfsplus get a deterministic zero value regardless of which early-return path is taken.

Related Identifiers

CVE-2026-64360

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-64360 · Security Note
• https://git.kernel.org/stable/c/16ca053c2be5f4f3044dccf7fc19237dc820d394 · Note
• https://git.kernel.org/stable/c/0b189b2204f1a2612dc68f8d139fb5b80539e710 · Note
• https://git.kernel.org/stable/c/d2afc7ecee476f9251dd87444f7fb6a424410922 · Note
• https://git.kernel.org/stable/c/8f72fd25a57a457866350359ddd27a43caa62c95 · Note
• https://git.kernel.org/stable/c/d67aadee19ffdf3cc8520c5a4f4d5b2916d30baf · Note
• https://git.kernel.org/stable/c/34684a04777358b2b40ac729e54c8e45359e46b3 · Note
• https://git.kernel.org/stable/c/d5b45bad75cd2730b8452aed4d3b20a2b2a12576 · Note
• https://git.kernel.org/stable/c/f3461b84a4865d9b5e70fbb71da72ae044a3bcd2 · Note