CVE-2026-64361
In the Linux kernel, the following vulnerability has been resolved: hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length check_and_correct_requested_length() compares (off + len) against node_size using u32 arithmetic. When the caller passes a large len value (e.g. from an underflowed subtraction in hfs_brec_remove()), off + len can wrap past 2^32 and produce a small result, causing the bounds check to pass when it should fail. For example, with off=14 and len=0xFFFFFFF2 (underflowed from data_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6, which is less than a typical node_size of 512, so the check passes and the subsequent memmove reads ~4GB past the node buffer. Fix this by widening the addition to u64 before comparing against node_size. This prevents the u32 wrap while keeping the logic straightforward.
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,
6.12.97,
6.18.40,
7.1.4,
7.2-rc1
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-64361?
CVE-2026-64361 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-2026-64361 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-2026-64361?
Yes. CVE-2026-64361 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-2026-64361 actively exploited?
No. CVE-2026-64361 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.