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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/607217f7ad419b53926f71e3f75001813bbc08ad cve-icon
https://git.kernel.org/stable/c/671c3fcc2ad31c1311ea6414382a2d95104ae1b9 cve-icon
https://git.kernel.org/stable/c/7399c3baee7bb622a92f0b895cd4d3009a693f2b cve-icon
https://git.kernel.org/stable/c/966cb76fb2857a4242cab6ea2ea17acf818a3da7 cve-icon
https://git.kernel.org/stable/c/b6a481642ea1977be2f84dc08c5affd742c177e7 cve-icon
https://git.kernel.org/stable/c/c25d3c931a63e762fcaa9cb125b901c53b62403f cve-icon
https://git.kernel.org/stable/c/c8dd112173c02adf539fe2ad34a45f5e0068780d cve-icon
https://git.kernel.org/stable/c/fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1 cve-icon
https://lore.kernel.org/linux-cve-announce/2026072520-CVE-2026-64361-e8bc@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-64361 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-64361 cve-icon
History

Thu, 30 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
References

Tue, 28 Jul 2026 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125
CWE-680

Mon, 27 Jul 2026 05:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Sat, 25 Jul 2026 09:30:00 +0000

Type Values Removed Values Added
Description 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.
Title hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-07-25T08:50:17.345Z

Updated: 2026-07-27T04:59:55.178Z

Reserved: 2026-07-19T15:36:31.783Z

Link: CVE-2026-64361

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

Severity :

Publid Date: 2026-07-25T00:00:00Z

Links: CVE-2026-64361 - Bugzilla