Vulnerability-Lookup

GHSA-7M86-H2JR-VW87

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:

SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path

Commit 5940d1cf9f42 ("SUNRPC: Rebalance a kref in auth_gss.c") added a kref_get(&gss_auth->kref) call to balance the gss_put_auth() done in gss_release_msg(), but forgot to add a corresponding kref_put() on the error path when kstrdup_const() fails.

If service_name is non-NULL and kstrdup_const() fails, the function jumps to err_put_pipe_version which calls put_pipe_version() and kfree(gss_msg), but never releases the gss_auth reference. This leads to a kref leak where the gss_auth structure is never freed.

Add a forward declaration for gss_free_callback() and call kref_put() in the err_put_pipe_version error path to properly release the reference taken earlier.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-45964"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T14:17:13Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: fix gss_auth kref leak in gss_alloc_msg error path\n\nCommit 5940d1cf9f42 (\"SUNRPC: Rebalance a kref in auth_gss.c\") added\na kref_get(\u0026gss_auth-\u003ekref) call to balance the gss_put_auth() done\nin gss_release_msg(), but forgot to add a corresponding kref_put()\non the error path when kstrdup_const() fails.\n\nIf service_name is non-NULL and kstrdup_const() fails, the function\njumps to err_put_pipe_version which calls put_pipe_version() and\nkfree(gss_msg), but never releases the gss_auth reference. This leads\nto a kref leak where the gss_auth structure is never freed.\n\nAdd a forward declaration for gss_free_callback() and call kref_put()\nin the err_put_pipe_version error path to properly release the\nreference taken earlier.",
  "id": "GHSA-7m86-h2jr-vw87",
  "modified": "2026-05-27T15:33:18Z",
  "published": "2026-05-27T15:33:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45964"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-45964 (GCVE-0-2026-45964)

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

Title

SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path

Summary

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path Commit 5940d1cf9f42 ("SUNRPC: Rebalance a kref in auth_gss.c") added a kref_get(&gss_auth->kref) call to balance the gss_put_auth() done in gss_release_msg(), but forgot to add a corresponding kref_put() on the error path when kstrdup_const() fails. If service_name is non-NULL and kstrdup_const() fails, the function jumps to err_put_pipe_version which calls put_pipe_version() and kfree(gss_msg), but never releases the gss_auth reference. This leads to a kref leak where the gss_auth structure is never freed. Add a forward declaration for gss_free_callback() and call kref_put() in the err_put_pipe_version error path to properly release the reference taken earlier.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/3b2b6c42070ce4204…
https://git.kernel.org/stable/c/b559be2ec6cdb2e9c…
https://git.kernel.org/stable/c/a1bc9561b617ec7e2…
https://git.kernel.org/stable/c/655c9ba9915f05266…
https://git.kernel.org/stable/c/e464e26b2457005c8…
https://git.kernel.org/stable/c/c20f925214249bb4f…
https://git.kernel.org/stable/c/a2d4e9a76de0b2178…
https://git.kernel.org/stable/c/dd2fdc3504592d85e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < 3b2b6c42070ce4204936288253baf101e995c2d3 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < 655c9ba9915f05266998dbbf4b76b3c79b8a70aa (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < e464e26b2457005c87e158570498274b9f3b90c7 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < c20f925214249bb4fc04f7e197bea142a6438af6 (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < a2d4e9a76de0b2178001214ba5de5bf94a7354aa (git) Affected: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e , < dd2fdc3504592d85e549c523b054898a036a6afe (git)
Linux	Linux	Affected: 5.2 Unaffected: 0 , < 5.2 (semver) Unaffected: 5.10.252 , ≤ 5.10.* (semver) Unaffected: 5.15.202 , ≤ 5.15.* (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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/auth_gss/auth_gss.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3b2b6c42070ce4204936288253baf101e995c2d3",
              "status": "affected",
              "version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e",
              "versionType": "git"
            },
            {
              "lessThan": "b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7",
              "status": "affected",
              "version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e",
              "versionType": "git"
            },
            {
              "lessThan": "a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6",
              "status": "affected",
              "version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e",
              "versionType": "git"
            },
            {
              "lessThan": "655c9ba9915f05266998dbbf4b76b3c79b8a70aa",
              "status": "affected",
              "version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e",
              "versionType": "git"
            },
            {
              "lessThan": "e464e26b2457005c87e158570498274b9f3b90c7",
              "status": "affected",
              "version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e",
              "versionType": "git"
            },
            {
              "lessThan": "c20f925214249bb4fc04f7e197bea142a6438af6",
              "status": "affected",
              "version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e",
              "versionType": "git"
            },
            {
              "lessThan": "a2d4e9a76de0b2178001214ba5de5bf94a7354aa",
              "status": "affected",
              "version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e",
              "versionType": "git"
            },
            {
              "lessThan": "dd2fdc3504592d85e549c523b054898a036a6afe",
              "status": "affected",
              "version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/auth_gss/auth_gss.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "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": "5.10.252",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSUNRPC: fix gss_auth kref leak in gss_alloc_msg error path\n\nCommit 5940d1cf9f42 (\"SUNRPC: Rebalance a kref in auth_gss.c\") added\na kref_get(\u0026gss_auth-\u003ekref) call to balance the gss_put_auth() done\nin gss_release_msg(), but forgot to add a corresponding kref_put()\non the error path when kstrdup_const() fails.\n\nIf service_name is non-NULL and kstrdup_const() fails, the function\njumps to err_put_pipe_version which calls put_pipe_version() and\nkfree(gss_msg), but never releases the gss_auth reference. This leads\nto a kref leak where the gss_auth structure is never freed.\n\nAdd a forward declaration for gss_free_callback() and call kref_put()\nin the err_put_pipe_version error path to properly release the\nreference taken earlier."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:18:22.052Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6"
        },
        {
          "url": "https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afe"
        }
      ],
      "title": "SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45964",
    "datePublished": "2026-05-27T12:18:22.052Z",
    "dateReserved": "2026-05-13T15:03:33.089Z",
    "dateUpdated": "2026-05-27T12:18:22.052Z",
    "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-7M86-H2JR-VW87

CVE-2026-45964 (GCVE-0-2026-45964)

Tags

Sightings

Nomenclature