CVE-2026-64360

hfs/hfsplus: zero-initialize buffer in hfs_bnode_read

State: Published
Severity: Not scored
Published: Jul 25, 2026
Updated: Aug 17, 2026
Reserved: Jul 19, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	67ecc81f6492275c9c54280532f558483c99c90e to before 34684a04777358b2b40ac729e54c8e45359e46b3Affected a1a60e79502279f996e55052f50cc14919020475 to before 0b189b2204f1a2612dc68f8d139fb5b80539e710Affected fe2891a9c43ab87d1a210d61e6438ca6936e2f62 to before 8f72fd25a57a457866350359ddd27a43caa62c95Affected 384a66b89f9540a9a8cb0f48807697dfabaece4c to before 16ca053c2be5f4f3044dccf7fc19237dc820d394Affected efc095b35b23297e419c2ab4fc1ed1a8f0781a29 to before d2afc7ecee476f9251dd87444f7fb6a424410922Affected a431930c9bac518bf99d6b1da526a7f37ddee8d8 to before f3461b84a4865d9b5e70fbb71da72ae044a3bcd2Affected a431930c9bac518bf99d6b1da526a7f37ddee8d8 to before d5b45bad75cd2730b8452aed4d3b20a2b2a12576Affected a431930c9bac518bf99d6b1da526a7f37ddee8d8 to before d67aadee19ffdf3cc8520c5a4f4d5b2916d30bafAffected e7d2dc2421e821e4045775e6dc226378328de6f6Affected fc7f732984ec91f30be3e574e0644066d07f2b78Affected eec522fd0d28106b14a59ab2d658605febe4a3bbAffected 5.10.241 to before 5.10.261Affected 5.15.190 to before 5.15.212Affected 6.1.149 to before 6.1.178Affected 6.6.103 to before 6.6.145Affected 6.12.43 to before 6.12.96Affected 5.4.297 to before 5.5Affected 6.15.11 to before 6.16Affected 6.16.2 to before 6.17Affected
LinuxLinux	6.17Affected before 6.17Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.96 through 6.12.Not affected 6.18.39 through 6.18.Not affected 7.1.4 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

67ecc81f6492275c9c54280532f558483c99c90e to before 34684a04777358b2b40ac729e54c8e45359e46b3Affected
a1a60e79502279f996e55052f50cc14919020475 to before 0b189b2204f1a2612dc68f8d139fb5b80539e710Affected
fe2891a9c43ab87d1a210d61e6438ca6936e2f62 to before 8f72fd25a57a457866350359ddd27a43caa62c95Affected
384a66b89f9540a9a8cb0f48807697dfabaece4c to before 16ca053c2be5f4f3044dccf7fc19237dc820d394Affected
efc095b35b23297e419c2ab4fc1ed1a8f0781a29 to before d2afc7ecee476f9251dd87444f7fb6a424410922Affected
a431930c9bac518bf99d6b1da526a7f37ddee8d8 to before f3461b84a4865d9b5e70fbb71da72ae044a3bcd2Affected
a431930c9bac518bf99d6b1da526a7f37ddee8d8 to before d5b45bad75cd2730b8452aed4d3b20a2b2a12576Affected
a431930c9bac518bf99d6b1da526a7f37ddee8d8 to before d67aadee19ffdf3cc8520c5a4f4d5b2916d30bafAffected
e7d2dc2421e821e4045775e6dc226378328de6f6Affected
fc7f732984ec91f30be3e574e0644066d07f2b78Affected
eec522fd0d28106b14a59ab2d658605febe4a3bbAffected
5.10.241 to before 5.10.261Affected
5.15.190 to before 5.15.212Affected
6.1.149 to before 6.1.178Affected
6.6.103 to before 6.6.145Affected
6.12.43 to before 6.12.96Affected
5.4.297 to before 5.5Affected
6.15.11 to before 6.16Affected
6.16.2 to before 6.17Affected

LinuxLinux

6.17Affected
before 6.17Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.96 through 6.12.*Not affected
6.18.39 through 6.18.*Not affected
7.1.4 through 7.1.*Not affected
7.2 and laterNot affected

References

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