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.
Affected versions
Linux kernel versions
5.10.241,
5.15.190,
6.1.149,
6.6.103,
6.12.43,
5.4.297,
6.15.11,
6.16.2,
6.17
and later are affected. Fixed in
5.10.261,
5.15.212,
6.1.178,
6.6.145,
6.12.96,
6.18.39,
7.1.4,
7.2-rc1
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-64360?
CVE-2026-64360 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.10.241 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-64360 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64360?
Yes. CVE-2026-64360 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 5.10.241 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64360 actively exploited?
No. CVE-2026-64360 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.