CVE-2026-64360hfs/hfsplus: zero-initialize buffer in hfs_bnode_read
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 67ecc81f6492275c9c54280532f558483c99c90e before 34684a04777358b2b40ac729e54c8e45359e46b3; from a1a60e79502279f996e55052f50cc14919020475 before 0b189b2204f1a2612dc68f8d139fb5b80539e710; from fe2891a9c43ab87d1a210d61e6438ca6936e2f62 before 8f72fd25a57a457866350359ddd27a43caa62c95; 384a66b89f9540a9a8cb0f48807697dfabaece4c builds before 16ca053c2be5f4f3044dccf7fc19237dc820d394; from efc095b35b23297e419c2ab4fc1ed1a8f0781a29 before d2afc7ecee476f9251dd87444f7fb6a424410922; from a431930c9bac518bf99d6b1da526a7f37ddee8d8 before f3461b84a4865d9b5e70fbb71da72ae044a3bcd2; from a431930c9bac518bf99d6b1da526a7f37ddee8d8 before d5b45bad75cd2730b8452aed4d3b20a2b2a12576; from a431930c9bac518bf99d6b1da526a7f37ddee8d8 before d67aadee19ffdf3cc8520c5a4f4d5b2916d30baf; and 11 more ranges | CNA record |
linux linux_kernel linux:linux_kernel | from 5.4.297 before 5.5; from 5.10.241 before 5.10.261; from 5.15.190 before 5.15.212; from 6.1.149 before 6.1.178; from 6.6.103 before 6.6.145; from 6.12.43 before 6.12.96; from 6.15.11 before 6.16; from 6.16.2 before 6.18.39; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/34684a04777358b2b40ac729e54c8e45359e46b3patch
- https://git.kernel.org/stable/c/0b189b2204f1a2612dc68f8d139fb5b80539e710patch
- https://git.kernel.org/stable/c/8f72fd25a57a457866350359ddd27a43caa62c95patch
- https://git.kernel.org/stable/c/16ca053c2be5f4f3044dccf7fc19237dc820d394patch
- https://git.kernel.org/stable/c/d2afc7ecee476f9251dd87444f7fb6a424410922patch
- https://git.kernel.org/stable/c/f3461b84a4865d9b5e70fbb71da72ae044a3bcd2patch
- https://git.kernel.org/stable/c/d5b45bad75cd2730b8452aed4d3b20a2b2a12576patch
- https://git.kernel.org/stable/c/d67aadee19ffdf3cc8520c5a4f4d5b2916d30bafpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.