CVE-2026-64360
Low
No strong exploitation signal.
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | H | High |
Timeline
- 2026-07-25 — Published (NVD)
- 2026-09-04 — Last modified (NVD)
Description
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.
Affected
References
- https://git.kernel.org/stable/c/0b189b2204f1a2612dc68f8d139fb5b80539e710
- https://git.kernel.org/stable/c/16ca053c2be5f4f3044dccf7fc19237dc820d394
- https://git.kernel.org/stable/c/34684a04777358b2b40ac729e54c8e45359e46b3
- https://git.kernel.org/stable/c/8f72fd25a57a457866350359ddd27a43caa62c95
- https://git.kernel.org/stable/c/d2afc7ecee476f9251dd87444f7fb6a424410922
- https://git.kernel.org/stable/c/d5b45bad75cd2730b8452aed4d3b20a2b2a12576
- https://git.kernel.org/stable/c/d67aadee19ffdf3cc8520c5a4f4d5b2916d30baf
- https://git.kernel.org/stable/c/f3461b84a4865d9b5e70fbb71da72ae044a3bcd2