hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64361
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:18 UTC
Updated2026-07-27 05:16:43 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001290000 probability, percentile 0.029510000 (date 2026-07-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 67ecc81f6492275c9c54280532f558483c99c90e c8dd112173c02adf539fe2ad34a45f5e0068780d git Not specified
CNA Linux Linux affected a1a60e79502279f996e55052f50cc14919020475 fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1 git Not specified
CNA Linux Linux affected fe2891a9c43ab87d1a210d61e6438ca6936e2f62 671c3fcc2ad31c1311ea6414382a2d95104ae1b9 git Not specified
CNA Linux Linux affected 384a66b89f9540a9a8cb0f48807697dfabaece4c b6a481642ea1977be2f84dc08c5affd742c177e7 git Not specified
CNA Linux Linux affected efc095b35b23297e419c2ab4fc1ed1a8f0781a29 7399c3baee7bb622a92f0b895cd4d3009a693f2b git Not specified
CNA Linux Linux affected a431930c9bac518bf99d6b1da526a7f37ddee8d8 607217f7ad419b53926f71e3f75001813bbc08ad git Not specified
CNA Linux Linux affected a431930c9bac518bf99d6b1da526a7f37ddee8d8 c25d3c931a63e762fcaa9cb125b901c53b62403f git Not specified
CNA Linux Linux affected a431930c9bac518bf99d6b1da526a7f37ddee8d8 966cb76fb2857a4242cab6ea2ea17acf818a3da7 git Not specified
CNA Linux Linux affected e7d2dc2421e821e4045775e6dc226378328de6f6 git Not specified
CNA Linux Linux affected fc7f732984ec91f30be3e574e0644066d07f2b78 git Not specified
CNA Linux Linux affected eec522fd0d28106b14a59ab2d658605febe4a3bb git Not specified
CNA Linux Linux affected 5.10.241 5.10.261 semver Not specified
CNA Linux Linux affected 5.15.190 5.15.212 semver Not specified
CNA Linux Linux affected 6.1.149 6.1.178 semver Not specified
CNA Linux Linux affected 6.6.103 6.6.145 semver Not specified
CNA Linux Linux affected 6.12.43 6.12.97 semver Not specified
CNA Linux Linux affected 5.4.297 5.5 semver Not specified
CNA Linux Linux affected 6.15.11 6.16 semver Not specified
CNA Linux Linux affected 6.16.2 6.17 semver Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/607217f7ad419b53926f71e3f75001813bbc08ad 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b6a481642ea1977be2f84dc08c5affd742c177e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/966cb76fb2857a4242cab6ea2ea17acf818a3da7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c8dd112173c02adf539fe2ad34a45f5e0068780d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7399c3baee7bb622a92f0b895cd4d3009a693f2b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/671c3fcc2ad31c1311ea6414382a2d95104ae1b9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c25d3c931a63e762fcaa9cb125b901c53b62403f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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