CVE-2026-45964 (GCVE-0-2026-45964)
Vulnerability from cvelistv5
Published
2026-05-27 12:18
Modified
2026-05-27 12:18
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e
Version: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e
Version: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e
Version: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e
Version: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e
Version: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e
Version: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e
Version: 5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e
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{
  "containers": {
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          "programFiles": [
            "net/sunrpc/auth_gss/auth_gss.c"
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      "cpeApplicability": [
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      "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"
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        {
          "url": "https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7"
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        {
          "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",
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  "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"
}


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