Vulnerability-Lookup

GHSA-5W3W-MCF7-V883

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 15:31

Details

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

smb: client: prevent races in ->query_interfaces()

It was possible for two query interface works to be concurrently trying to update the interfaces.

Prevent this by checking and updating iface_last_update under iface_lock.

Severity ?

8.8 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43239"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:44Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: prevent races in -\u003equery_interfaces()\n\nIt was possible for two query interface works to be concurrently trying\nto update the interfaces.\n\nPrevent this by checking and updating iface_last_update under\niface_lock.",
  "id": "GHSA-5w3w-mcf7-v883",
  "modified": "2026-05-08T15:31:18Z",
  "published": "2026-05-06T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43239"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6287eefaf21ec805d42f941bd368018cf397a7f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76cc4faba0343c6db945b8dc75425b33d633e1b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/93e8e3ee165ae4609a1222b516b573837103d2c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab6564f416a6eaf1199200b6100952407b438f7d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c3c06e42e1527716c54f3ad2ced6a034b5f3a489"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43239 (GCVE-0-2026-43239)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:20

Title

smb: client: prevent races in ->query_interfaces()

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: prevent races in ->query_interfaces() It was possible for two query interface works to be concurrently trying to update the interfaces. Prevent this by checking and updating iface_last_update under iface_lock.

Severity ?

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/93e8e3ee165ae4609…
https://git.kernel.org/stable/c/ab6564f416a6eaf11…
https://git.kernel.org/stable/c/6287eefaf21ec805d…
https://git.kernel.org/stable/c/76cc4faba0343c6db…
https://git.kernel.org/stable/c/c3c06e42e1527716c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: aa45dadd34e44fcd6a9df4b395bee5b5633b4cec , < 93e8e3ee165ae4609a1222b516b573837103d2c3 (git) Affected: aa45dadd34e44fcd6a9df4b395bee5b5633b4cec , < ab6564f416a6eaf1199200b6100952407b438f7d (git) Affected: aa45dadd34e44fcd6a9df4b395bee5b5633b4cec , < 6287eefaf21ec805d42f941bd368018cf397a7f5 (git) Affected: aa45dadd34e44fcd6a9df4b395bee5b5633b4cec , < 76cc4faba0343c6db945b8dc75425b33d633e1b8 (git) Affected: aa45dadd34e44fcd6a9df4b395bee5b5633b4cec , < c3c06e42e1527716c54f3ad2ced6a034b5f3a489 (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 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/smb2ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "93e8e3ee165ae4609a1222b516b573837103d2c3",
              "status": "affected",
              "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
              "versionType": "git"
            },
            {
              "lessThan": "ab6564f416a6eaf1199200b6100952407b438f7d",
              "status": "affected",
              "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
              "versionType": "git"
            },
            {
              "lessThan": "6287eefaf21ec805d42f941bd368018cf397a7f5",
              "status": "affected",
              "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
              "versionType": "git"
            },
            {
              "lessThan": "76cc4faba0343c6db945b8dc75425b33d633e1b8",
              "status": "affected",
              "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
              "versionType": "git"
            },
            {
              "lessThan": "c3c06e42e1527716c54f3ad2ced6a034b5f3a489",
              "status": "affected",
              "version": "aa45dadd34e44fcd6a9df4b395bee5b5633b4cec",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "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": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "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": "6.6.128",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                },
                {
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                }
              ],
              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: prevent races in -\u003equery_interfaces()\n\nIt was possible for two query interface works to be concurrently trying\nto update the interfaces.\n\nPrevent this by checking and updating iface_last_update under\niface_lock."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:20:41.885Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/93e8e3ee165ae4609a1222b516b573837103d2c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab6564f416a6eaf1199200b6100952407b438f7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/6287eefaf21ec805d42f941bd368018cf397a7f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/76cc4faba0343c6db945b8dc75425b33d633e1b8"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3c06e42e1527716c54f3ad2ced6a034b5f3a489"
        }
      ],
      "title": "smb: client: prevent races in -\u003equery_interfaces()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43239",
    "datePublished": "2026-05-06T11:28:33.623Z",
    "dateReserved": "2026-05-01T14:12:55.995Z",
    "dateUpdated": "2026-05-11T22:20:41.885Z",
    "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-5W3W-MCF7-V883

CVE-2026-43239 (GCVE-0-2026-43239)

Tags

Sightings

Nomenclature