CVE-2026-64360

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux67ecc81f6492275c9c54280532f558483c99c90e < 34684a04777358b2b40ac729e54c8e45359e46b3affected
LinuxLinuxa1a60e79502279f996e55052f50cc14919020475 < 0b189b2204f1a2612dc68f8d139fb5b80539e710affected
LinuxLinuxfe2891a9c43ab87d1a210d61e6438ca6936e2f62 < 8f72fd25a57a457866350359ddd27a43caa62c95affected
LinuxLinux384a66b89f9540a9a8cb0f48807697dfabaece4c < 16ca053c2be5f4f3044dccf7fc19237dc820d394affected
LinuxLinuxefc095b35b23297e419c2ab4fc1ed1a8f0781a29 < d2afc7ecee476f9251dd87444f7fb6a424410922affected
LinuxLinuxa431930c9bac518bf99d6b1da526a7f37ddee8d8 < f3461b84a4865d9b5e70fbb71da72ae044a3bcd2affected
LinuxLinuxa431930c9bac518bf99d6b1da526a7f37ddee8d8 < d5b45bad75cd2730b8452aed4d3b20a2b2a12576affected
LinuxLinuxa431930c9bac518bf99d6b1da526a7f37ddee8d8 < d67aadee19ffdf3cc8520c5a4f4d5b2916d30bafaffected
LinuxLinuxe7d2dc2421e821e4045775e6dc226378328de6f6affected
LinuxLinuxfc7f732984ec91f30be3e574e0644066d07f2b78affected
LinuxLinuxeec522fd0d28106b14a59ab2d658605febe4a3bbaffected
LinuxLinux5.10.241 < 5.10.261affected
LinuxLinux5.15.190 < 5.15.212affected
LinuxLinux6.1.149 < 6.1.178affected
LinuxLinux6.6.103 < 6.6.145affected
LinuxLinux6.12.43 < 6.12.96affected
LinuxLinux5.4.297 < 5.5affected
LinuxLinux6.15.11 < 6.16affected
LinuxLinux6.16.2 < 6.17affected
LinuxLinux6.17affected
LinuxLinux0 < 6.17unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References