FKIE_CVE-2026-45964

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-05-27 14:48
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7
Impacted products
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{
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-45964",
  "lastModified": "2026-05-27T14:48:03.013",
  "metrics": {},
  "published": "2026-05-27T14:17:13.177",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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