Vulnerability-Lookup

GHSA-89GF-R4Q6-P3C9

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-05-28 12:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46185"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:34Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-89gf-r4q6-p3c9",
  "modified": "2026-05-28T12:30:32Z",
  "published": "2026-05-28T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46185"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15dc0a4de743a1aaa7b859b3aea79f08c695396c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8c8a704f0bc133deb171f6aeb6f3a684203e212"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b9561402489d41149f63e001a74384863b7b30a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d62b8d236fab503c6fec1d3e9a38bea71feaca20"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef6495d4df6e7af8f3de67e65150881c880f696c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46185 (GCVE-0-2026-46185)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-05-28 09:36

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

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/ef6495d4df6e7af8f…
https://git.kernel.org/stable/c/15dc0a4de743a1aaa…
https://git.kernel.org/stable/c/b8c8a704f0bc133de…
https://git.kernel.org/stable/c/b9561402489d41149…
https://git.kernel.org/stable/c/d62b8d236fab503c6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	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)
Linux	Linux	Affected: 6.1 Unaffected: 0 , < 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-rc3 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2misc.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ef6495d4df6e7af8f3de67e65150881c880f696c",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
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              "versionType": "git"
            },
            {
              "lessThan": "d62b8d236fab503c6fec1d3e9a38bea71feaca20",
              "status": "affected",
              "version": "76894f3e2f71177747b8b4763fb180e800279585",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "2d046892a493d9760c35fdaefc3017f27f91b621",
              "versionType": "git"
            },
            {
              "lessThan": "6.1",
              "status": "affected",
              "version": "6.0.16",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2misc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
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                },
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                },
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        {
          "lang": "en",
          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:36:39.318Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/ef6495d4df6e7af8f3de67e65150881c880f696c"
        },
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          "url": "https://git.kernel.org/stable/c/15dc0a4de743a1aaa7b859b3aea79f08c695396c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b8c8a704f0bc133deb171f6aeb6f3a684203e212"
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        {
          "url": "https://git.kernel.org/stable/c/b9561402489d41149f63e001a74384863b7b30a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/d62b8d236fab503c6fec1d3e9a38bea71feaca20"
        }
      ],
      "title": "smb/client: fix out-of-bounds read in symlink_data()",
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        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46185",
    "datePublished": "2026-05-28T09:36:39.318Z",
    "dateReserved": "2026-05-13T15:03:33.103Z",
    "dateUpdated": "2026-05-28T09:36:39.318Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-89GF-R4Q6-P3C9

CVE-2026-46185 (GCVE-0-2026-46185)

Tags

Sightings

Nomenclature