CVE-2026-64361 (GCVE-0-2026-64361)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50
VLAI
EPSS
VEX
Title
hfs/hfsplus: fix u32 overflow in check_and_correct_requested_length
Summary
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.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
67ecc81f6492275c9c54280532f558483c99c90e , < c8dd112173c02adf539fe2ad34a45f5e0068780d
(git)
Affected: a1a60e79502279f996e55052f50cc14919020475 , < fc9d1447ca3cdc78d2e4ace1ce1f3a7c77ca08b1 (git) Affected: fe2891a9c43ab87d1a210d61e6438ca6936e2f62 , < 671c3fcc2ad31c1311ea6414382a2d95104ae1b9 (git) Affected: 384a66b89f9540a9a8cb0f48807697dfabaece4c , < b6a481642ea1977be2f84dc08c5affd742c177e7 (git) Affected: efc095b35b23297e419c2ab4fc1ed1a8f0781a29 , < 7399c3baee7bb622a92f0b895cd4d3009a693f2b (git) Affected: a431930c9bac518bf99d6b1da526a7f37ddee8d8 , < 607217f7ad419b53926f71e3f75001813bbc08ad (git) Affected: a431930c9bac518bf99d6b1da526a7f37ddee8d8 , < c25d3c931a63e762fcaa9cb125b901c53b62403f (git) Affected: a431930c9bac518bf99d6b1da526a7f37ddee8d8 , < 966cb76fb2857a4242cab6ea2ea17acf818a3da7 (git) Affected: e7d2dc2421e821e4045775e6dc226378328de6f6 (git) Affected: fc7f732984ec91f30be3e574e0644066d07f2b78 (git) Affected: eec522fd0d28106b14a59ab2d658605febe4a3bb (git) Affected: 5.10.241 , < 5.10.261 (semver) Affected: 5.15.190 , < 5.15.212 (semver) Affected: 6.1.149 , < 6.1.178 (semver) Affected: 6.6.103 , < 6.6.145 (semver) Affected: 6.12.43 , < 6.12.97 (semver) Affected: 5.4.297 , < 5.5 (semver) Affected: 6.15.11 , < 6.16 (semver) Affected: 6.16.2 , < 6.17 (semver) |
|
| Linux | Linux |
Affected:
6.17
Unaffected: 0 , < 6.17 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfs/hfsplus: fix u32 overflow in check_and_correct_requested_length\n\ncheck_and_correct_requested_length() compares (off + len) against\nnode_size using u32 arithmetic. When the caller passes a large len\nvalue (e.g. from an underflowed subtraction in hfs_brec_remove()),\noff + len can wrap past 2^32 and produce a small result, causing the\nbounds check to pass when it should fail.\n\nFor example, with off=14 and len=0xFFFFFFF2 (underflowed from\ndata_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6,\nwhich is less than a typical node_size of 512, so the check passes and\nthe subsequent memmove reads ~4GB past the node buffer.\n\nFix this by widening the addition to u64 before comparing against\nnode_size. This prevents the u32 wrap while keeping the logic\nstraightforward."
}
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},
{
"url": "https://git.kernel.org/stable/c/966cb76fb2857a4242cab6ea2ea17acf818a3da7"
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"dateReserved": "2026-07-19T15:36:31.783Z",
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"date": "2026-07-26",
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When the caller passes a large len\\nvalue (e.g. from an underflowed subtraction in hfs_brec_remove()),\\noff + len can wrap past 2^32 and produce a small result, causing the\\nbounds check to pass when it should fail.\\n\\nFor example, with off=14 and len=0xFFFFFFF2 (underflowed from\\ndata_off - keyoffset - size in hfs_brec_remove), off + len wraps to 6,\\nwhich is less than a typical node_size of 512, so the check passes and\\nthe subsequent memmove reads ~4GB past the node buffer.\\n\\nFix this by widening the addition to u64 before comparing against\\nnode_size. 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"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-07-25T16:01:00Z",
"cve": "CVE-2026-64361",
"id": "CVE-2026-64361",
"initial_release_date": "2026-07-25T16:01:00Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64361",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64361.json",
"version": "2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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