# CVE-2026-64360: linux: In the Linux kernel, the following vulnerability has been resolved:  hfs/hfsplus: zero-initialize buffer in hfs_bnode...

CVE-2026-64360 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-64360, released July 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-64360
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0012
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 25, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.180-1 | [DEBIAN-CVE-2026-64360](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64360.md) | Jul 26, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.96-1 | [DEBIAN-CVE-2026-64360](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64360.md) | Jul 26, 2026 |
| Linux | linux Debian 14 | 7.1.4-1 | [DEBIAN-CVE-2026-64360](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64360.md) | Jul 26, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.100-1~deb12u1 | [DEBIAN-CVE-2026-64360](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64360.md) | Jul 26, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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