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CVE-2026-64360

UnknownEPSS 0.18%

Last modified

CVE-2026-64360 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.18%

7.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 67ecc81f6492275c9c54280532f558483c99c90e, < 34684a04777358b2b40ac729e54c8e45359e46b3; >= a1a60e79502279f996e55052f50cc14919020475, < 0b189b2204f1a2612dc68f8d139fb5b80539e710; >= fe2891a9c43ab87d1a210d61e6438ca6936e2f62, < 8f72fd25a57a457866350359ddd27a43caa62c95; >= 384a66b89f9540a9a8cb0f48807697dfabaece4c, < 16ca053c2be5f4f3044dccf7fc19237dc820d394; >= efc095b35b23297e419c2ab4fc1ed1a8f0781a29, < d2afc7ecee476f9251dd87444f7fb6a424410922; >= a431930c9bac518bf99d6b1da526a7f37ddee8d8, < f3461b84a4865d9b5e70fbb71da72ae044a3bcd2; >= a431930c9bac518bf99d6b1da526a7f37ddee8d8, < d5b45bad75cd2730b8452aed4d3b20a2b2a12576; >= a431930c9bac518bf99d6b1da526a7f37ddee8d8, < d67aadee19ffdf3cc8520c5a4f4d5b2916d30baf; e7d2dc2421e821e4045775e6dc226378328de6f6; fc7f732984ec91f30be3e574e0644066d07f2b78; eec522fd0d28106b14a59ab2d658605febe4a3bb; >= 5.10.241, < 5.10.261; >= 5.15.190, < 5.15.212; >= 6.1.149, < 6.1.178; >= 6.6.103, < 6.6.145; >= 6.12.43, < 6.12.96; >= 5.4.297, < 5.5; >= 6.15.11, < 6.16; >= 6.16.2, < 6.17
LinuxLinux6.17

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-64360?
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.
How severe is CVE-2026-64360?
Severity scoring for CVE-2026-64360 is pending analysis. The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-64360?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST