CVE-2026-46185 (GCVE-0-2026-46185)
Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-08-05 12:30
VLAI
EPSS
VEX
Title
smb/client: fix out-of-bounds read in symlink_data()
Summary
In the Linux kernel, the following vulnerability has been resolved:
smb/client: fix out-of-bounds read in symlink_data()
Since smb2_check_message() returns success without length validation for
the symlink error response, in symlink_data() it is possible for
iov->iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer
only contains the base SMB2 header (64 bytes), accessing
err->ErrorContextCount (at offset 66) or err->ByteCount later in
symlink_data() will cause an out-of-bounds read.
Severity
9.1 (Critical)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
76894f3e2f71177747b8b4763fb180e800279585 , < 2be11faf79e49fb8250a181ff0b4d2b2f084af83
(git)
Affected: 76894f3e2f71177747b8b4763fb180e800279585 , < ef6495d4df6e7af8f3de67e65150881c880f696c (git) Affected: 76894f3e2f71177747b8b4763fb180e800279585 , < 15dc0a4de743a1aaa7b859b3aea79f08c695396c (git) Affected: 76894f3e2f71177747b8b4763fb180e800279585 , < b8c8a704f0bc133deb171f6aeb6f3a684203e212 (git) Affected: 76894f3e2f71177747b8b4763fb180e800279585 , < b9561402489d41149f63e001a74384863b7b30a6 (git) Affected: 76894f3e2f71177747b8b4763fb180e800279585 , < d62b8d236fab503c6fec1d3e9a38bea71feaca20 (git) Affected: 2d046892a493d9760c35fdaefc3017f27f91b621 (git) Affected: 6.0.16 , < 6.1 (semver) |
guessed | |
| Linux | Linux |
Affected:
6.1
Unaffected: 0 , < 6.1 (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: fix out-of-bounds read in symlink_data()\n\nSince smb2_check_message() returns success without length validation for\nthe symlink error response, in symlink_data() it is possible for\niov-\u003eiov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer\nonly contains the base SMB2 header (64 bytes), accessing\nerr-\u003eErrorContextCount (at offset 66) or err-\u003eByteCount later in\nsymlink_data() will cause an out-of-bounds read."
}
],
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"version": "3.1"
},
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{
"lang": "en",
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}
]
}
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{
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},
{
"url": "https://git.kernel.org/stable/c/d62b8d236fab503c6fec1d3e9a38bea71feaca20"
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"datePublished": "2026-05-28T09:36:39.318Z",
"dateReserved": "2026-05-13T15:03:33.103Z",
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"id": "msrc_CVE-2026-46185",
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"source": "Microsoft CSAF VEX",
"status": "final",
"title": "smb/client: fix out-of-bounds read in symlink_data()",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46185.json",
"version": "3"
},
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If the buffer\\nonly contains the base SMB2 header (64 bytes), accessing\\nerr-\u003eErrorContextCount (at offset 66) or err-\u003eByteCount later in\\nsymlink_data() will cause an out-of-bounds 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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-04T08:02:58+00:00",
"cve": "CVE-2026-46185",
"id": "CVE-2026-46185",
"initial_release_date": "2026-05-28T00:00:00+00:00",
"product_status:fixed": "612",
"product_status:known_affected": "22",
"product_status:known_not_affected": "90",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: smb/client: fix out-of-bounds read in symlink_data()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46185.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:11:28Z",
"cve": "CVE-2026-46185",
"id": "CVE-2026-46185",
"initial_release_date": "2026-05-29T01:15:34Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "528",
"product_status:known_not_affected": "175",
"product_status:recommended": "364",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-46185",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46185.json",
"version": "17"
}
}
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
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vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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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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