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 products
linux: linux kernel
References8
- git.kernel.org/stable/c/0b189b2204f1a2612dc68f8d139fb5b80539e710 Patch
- git.kernel.org/stable/c/16ca053c2be5f4f3044dccf7fc19237dc820d394 Patch
- git.kernel.org/stable/c/34684a04777358b2b40ac729e54c8e45359e46b3 Patch
- git.kernel.org/stable/c/8f72fd25a57a457866350359ddd27a43caa62c95 Patch
- git.kernel.org/stable/c/d2afc7ecee476f9251dd87444f7fb6a424410922 Patch
- git.kernel.org/stable/c/d5b45bad75cd2730b8452aed4d3b20a2b2a12576 Patch
- git.kernel.org/stable/c/d67aadee19ffdf3cc8520c5a4f4d5b2916d30baf Patch
- git.kernel.org/stable/c/f3461b84a4865d9b5e70fbb71da72ae044a3bcd2 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 14 November 2026
- CWE
- CWE-908
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