CVE-2026-64360 (GCVE-0-2026-64360)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-08-17 04:54
VLAI
EPSS
VEX
Title
hfs/hfsplus: zero-initialize buffer in hfs_bnode_read
Summary
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.
Severity
5.5 (Medium)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
67ecc81f6492275c9c54280532f558483c99c90e , < 34684a04777358b2b40ac729e54c8e45359e46b3
(git)
Affected: a1a60e79502279f996e55052f50cc14919020475 , < 0b189b2204f1a2612dc68f8d139fb5b80539e710 (git) Affected: fe2891a9c43ab87d1a210d61e6438ca6936e2f62 , < 8f72fd25a57a457866350359ddd27a43caa62c95 (git) Affected: 384a66b89f9540a9a8cb0f48807697dfabaece4c , < 16ca053c2be5f4f3044dccf7fc19237dc820d394 (git) Affected: efc095b35b23297e419c2ab4fc1ed1a8f0781a29 , < d2afc7ecee476f9251dd87444f7fb6a424410922 (git) Affected: a431930c9bac518bf99d6b1da526a7f37ddee8d8 , < f3461b84a4865d9b5e70fbb71da72ae044a3bcd2 (git) Affected: a431930c9bac518bf99d6b1da526a7f37ddee8d8 , < d5b45bad75cd2730b8452aed4d3b20a2b2a12576 (git) Affected: a431930c9bac518bf99d6b1da526a7f37ddee8d8 , < d67aadee19ffdf3cc8520c5a4f4d5b2916d30baf (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 , < 6.12.96 (semver) Affected: 5.4.297 , < 5.5 (semver) Affected: 6.15.11 , < 6.16 (semver) Affected: 6.16.2 , < 6.17 (semver) |
guessed | |
| 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: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "6228DDD6-4557-4AA3-9F43-AB995D471E42",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "6.19",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfs/hfsplus: zero-initialize buffer in hfs_bnode_read\n\nhfs_bnode_read() can return early without writing to the output buffer\nwhen is_bnode_offset_valid() fails or when check_and_correct_requested_\nlength() corrects the length to zero. Callers such as hfs_bnode_read_\nu16() and hfs_bnode_read_u8() pass stack-allocated buffers and use the\nresult unconditionally, leading to KMSAN uninit-value reports.\n\nRather than initializing at each individual call site, zero the buffer\nat the start of hfs_bnode_read() before any validation checks. This\nensures all callers in both hfs and hfsplus get a deterministic zero\nvalue regardless of which early-return path is taken."
}
],
"id": "CVE-2026-64360",
"lastModified": "2026-09-04T15:57:26.883",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2026-07-25T10:17:18.530",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/0b189b2204f1a2612dc68f8d139fb5b80539e710"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/16ca053c2be5f4f3044dccf7fc19237dc820d394"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/34684a04777358b2b40ac729e54c8e45359e46b3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/8f72fd25a57a457866350359ddd27a43caa62c95"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/d2afc7ecee476f9251dd87444f7fb6a424410922"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/d5b45bad75cd2730b8452aed4d3b20a2b2a12576"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/d67aadee19ffdf3cc8520c5a4f4d5b2916d30baf"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/f3461b84a4865d9b5e70fbb71da72ae044a3bcd2"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-908"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-04T17:53:33+00:00",
"cve": "CVE-2026-64360",
"id": "CVE-2026-64360",
"initial_release_date": "2026-07-25T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: hfs/hfsplus: zero-initialize buffer in hfs_bnode_read",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64360.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-05T00:30:08Z",
"cve": "CVE-2026-64360",
"id": "CVE-2026-64360",
"initial_release_date": "2026-07-25T16:01:01Z",
"product_status:known_affected": "96",
"product_status:known_not_affected": "280",
"product_status:recommended": "4",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64360",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64360.json",
"version": "6"
}
}
}
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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