Vulnerability-Lookup

GHSA-6W7X-Q46J-6X9R

Vulnerability from github – Published: 2026-05-27 15:33 – Updated: 2026-05-27 15:33

Details

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix potential UAF and double free in smb2_open_file()

Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45972"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:14Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential UAF and double free in smb2_open_file()\n\nZero out @err_iov and @err_buftype before retrying SMB2_open() to\nprevent an UAF bug if @data != NULL, otherwise a double free.",
  "id": "GHSA-6w7x-q46j-6x9r",
  "modified": "2026-05-27T15:33:18Z",
  "published": "2026-05-27T15:33:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45972"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-45972 (GCVE-0-2026-45972)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:18 – Updated: 2026-05-27 12:18

Title

smb: client: fix potential UAF and double free in smb2_open_file()

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/96e53bb3ee2f354cf…
https://git.kernel.org/stable/c/7425453ea16dbc3bb…
https://git.kernel.org/stable/c/4d339b219004869e9…
https://git.kernel.org/stable/c/e66dcf7bb9c4df558…
https://git.kernel.org/stable/c/639deb962986ef2f5…
https://git.kernel.org/stable/c/ebbbc4bfad4cb355d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 743f70406264348c0830f38409eb6c40a42fb2db , < 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 (git) Affected: 3a6d6b332f92990958602c1e35ce0173e2dd62e9 , < 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 (git) Affected: b64e3b5d8d759dd4333992e4ba4dadf9359952c8 , < 4d339b219004869e96c4ce56b8891f83a38da4c0 (git) Affected: 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 , < e66dcf7bb9c4df5582c82bc3582725abcbfbea73 (git) Affected: e3a43633023e3cacaca60d4b8972d084a2b06236 , < 639deb962986ef2f5e2a6d5a600c66f922471e81 (git) Affected: e3a43633023e3cacaca60d4b8972d084a2b06236 , < ebbbc4bfad4cb355d17c671223d0814ee3ef4eda (git) Affected: 6.1.163 , < 6.1.165 (semver) Affected: 6.6.124 , < 6.6.128 (semver) Affected: 6.12.70 , < 6.12.75 (semver) Affected: 6.18.10 , < 6.18.14 (semver)
Linux	Linux	Affected: 6.19 Unaffected: 0 , < 6.19 (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "7425453ea16dbc3bbb0f6cac4d60b537e5e4d151",
              "status": "affected",
              "version": "3a6d6b332f92990958602c1e35ce0173e2dd62e9",
              "versionType": "git"
            },
            {
              "lessThan": "4d339b219004869e96c4ce56b8891f83a38da4c0",
              "status": "affected",
              "version": "b64e3b5d8d759dd4333992e4ba4dadf9359952c8",
              "versionType": "git"
            },
            {
              "lessThan": "e66dcf7bb9c4df5582c82bc3582725abcbfbea73",
              "status": "affected",
              "version": "9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5",
              "versionType": "git"
            },
            {
              "lessThan": "639deb962986ef2f5e2a6d5a600c66f922471e81",
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            },
            {
              "lessThan": "ebbbc4bfad4cb355d17c671223d0814ee3ef4eda",
              "status": "affected",
              "version": "e3a43633023e3cacaca60d4b8972d084a2b06236",
              "versionType": "git"
            },
            {
              "lessThan": "6.1.165",
              "status": "affected",
              "version": "6.1.163",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.128",
              "status": "affected",
              "version": "6.6.124",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.75",
              "status": "affected",
              "version": "6.12.70",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.14",
              "status": "affected",
              "version": "6.18.10",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "6.1.163",
                  "vulnerable": true
                },
                {
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                },
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
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                  "vulnerable": true
                },
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                }
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential UAF and double free in smb2_open_file()\n\nZero out @err_iov and @err_buftype before retrying SMB2_open() to\nprevent an UAF bug if @data != NULL, otherwise a double free."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:18:31.500Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74"
        },
        {
          "url": "https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0"
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        {
          "url": "https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda"
        }
      ],
      "title": "smb: client: fix potential UAF and double free in smb2_open_file()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45972",
    "datePublished": "2026-05-27T12:18:31.500Z",
    "dateReserved": "2026-05-13T15:03:33.090Z",
    "dateUpdated": "2026-05-27T12:18:31.500Z",
    "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-6W7X-Q46J-6X9R

CVE-2026-45972 (GCVE-0-2026-45972)

Tags

Sightings

Nomenclature