Vulnerability-Lookup

GHSA-XR9R-HXJ6-96P6

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-14 21:30

Details

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

cifs: fix small mempool leak in SMB2_negotiate()

In some cases of failure (dialect mismatches) in SMB2_negotiate(), after the request is sent, the checks would return -EIO when they should be rather setting rc = -EIO and jumping to neg_exit to free the response buffer from mempool.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49938"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:20Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: fix small mempool leak in SMB2_negotiate()\n\nIn some cases of failure (dialect mismatches) in SMB2_negotiate(), after\nthe request is sent, the checks would return -EIO when they should be\nrather setting rc = -EIO and jumping to neg_exit to free the response\nbuffer from mempool.",
  "id": "GHSA-xr9r-hxj6-96p6",
  "modified": "2025-11-14T21:30:27Z",
  "published": "2025-06-18T12:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49938"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27893dfc1285f80f80f46b3b8c95f5d15d2e66d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38a6b469bf22f153282fbe7d702a24e9eb43f50e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e3c9efa7caf16e5acc05eab5e4d0a714e1610b0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49938 (GCVE-0-2022-49938)

Vulnerability from cvelistv5 – Published: 2025-06-18 10:54 – Updated: 2026-05-23 15:23

Title

cifs: fix small mempool leak in SMB2_negotiate()

Summary

In the Linux kernel, the following vulnerability has been resolved: cifs: fix small mempool leak in SMB2_negotiate() In some cases of failure (dialect mismatches) in SMB2_negotiate(), after the request is sent, the checks would return -EIO when they should be rather setting rc = -EIO and jumping to neg_exit to free the response buffer from mempool.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/9e3c9efa7caf16e5a…
https://git.kernel.org/stable/c/38a6b469bf22f1532…
https://git.kernel.org/stable/c/27893dfc1285f80f8…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9764c02fcbad40001fd3f63558d918e4d519bb75 , < 9e3c9efa7caf16e5acc05eab5e4d0a714e1610b0 (git) Affected: 9764c02fcbad40001fd3f63558d918e4d519bb75 , < 38a6b469bf22f153282fbe7d702a24e9eb43f50e (git) Affected: 9764c02fcbad40001fd3f63558d918e4d519bb75 , < 27893dfc1285f80f80f46b3b8c95f5d15d2e66d0 (git) Affected: 1ae6f05d4204d3a128bb9ba2c42e2a6c4ac687f1 (git) Affected: 4.13.5 , < 4.14 (semver)
Linux	Linux	Affected: 4.14 Unaffected: 0 , < 4.14 (semver) Unaffected: 5.15.66 , ≤ 5.15.* (semver) Unaffected: 5.19.8 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/cifs/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9e3c9efa7caf16e5acc05eab5e4d0a714e1610b0",
              "status": "affected",
              "version": "9764c02fcbad40001fd3f63558d918e4d519bb75",
              "versionType": "git"
            },
            {
              "lessThan": "38a6b469bf22f153282fbe7d702a24e9eb43f50e",
              "status": "affected",
              "version": "9764c02fcbad40001fd3f63558d918e4d519bb75",
              "versionType": "git"
            },
            {
              "lessThan": "27893dfc1285f80f80f46b3b8c95f5d15d2e66d0",
              "status": "affected",
              "version": "9764c02fcbad40001fd3f63558d918e4d519bb75",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1ae6f05d4204d3a128bb9ba2c42e2a6c4ac687f1",
              "versionType": "git"
            },
            {
              "lessThan": "4.14",
              "status": "affected",
              "version": "4.13.5",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/cifs/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.14"
            },
            {
              "lessThan": "4.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.66",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.8",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.13.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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          "lang": "en",
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:23:18.671Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/38a6b469bf22f153282fbe7d702a24e9eb43f50e"
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        {
          "url": "https://git.kernel.org/stable/c/27893dfc1285f80f80f46b3b8c95f5d15d2e66d0"
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      "title": "cifs: fix small mempool leak in SMB2_negotiate()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49938",
    "datePublished": "2025-06-18T10:54:39.458Z",
    "dateReserved": "2025-05-01T14:05:17.255Z",
    "dateUpdated": "2026-05-23T15:23:18.671Z",
    "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.

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.
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GHSA-XR9R-HXJ6-96P6

CVE-2022-49938 (GCVE-0-2022-49938)

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