CVE-2026-89498 (GCVE-0-2026-89498)
Vulnerability from cvelistv5
Published
2026-09-11 19:43
Modified
2026-10-19 08:47
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: orangefs: fix double-free of trailer_buf on readdir copy failure On a readdir downcall, orangefs_devreq_write_iter() frees op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails, but does not clear the pointer before goto Efault. The waiter in do_readdir() is then woken with a negative status and frees the same pointer again on its r < 0 path, causing a deterministic double-free. A client holding /dev/pvfs2-req triggers it by sending a readdir downcall whose declared trailer_size exceeds the bytes it supplies. Clear the pointer after freeing so the readdir-side vfree() becomes a no-op.
References
Impacted products
Vendor Product Version
Linux Linux Version: 382f4581e67f57209c7aa67e39f26ba076306a2e
Version: 382f4581e67f57209c7aa67e39f26ba076306a2e
Version: 382f4581e67f57209c7aa67e39f26ba076306a2e
Version: 382f4581e67f57209c7aa67e39f26ba076306a2e
Version: 382f4581e67f57209c7aa67e39f26ba076306a2e
Version: 382f4581e67f57209c7aa67e39f26ba076306a2e
Version: 382f4581e67f57209c7aa67e39f26ba076306a2e
Version: 382f4581e67f57209c7aa67e39f26ba076306a2e
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{
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          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\norangefs: fix double-free of trailer_buf on readdir copy failure\n\nOn a readdir downcall, orangefs_devreq_write_iter() frees\nop-\u003edowncall.trailer_buf with vfree() when copy_from_iter_full() fails,\nbut does not clear the pointer before goto Efault. The waiter in\ndo_readdir() is then woken with a negative status and frees the same\npointer again on its r \u003c 0 path, causing a deterministic double-free.\nA client holding /dev/pvfs2-req triggers it by sending a readdir\ndowncall whose declared trailer_size exceeds the bytes it supplies.\n\nClear the pointer after freeing so the readdir-side vfree() becomes a\nno-op."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:47:49.902Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/712c4235fcc73c11a2f1d59a499d489e49c374a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/433c2e470053cc9c712314d3d8c3dfbc862d68eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad"
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        {
          "url": "https://git.kernel.org/stable/c/9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa"
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        {
          "url": "https://git.kernel.org/stable/c/2f5454a25127854c232fde5d1d65d16fbcd42d43"
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          "url": "https://git.kernel.org/stable/c/f796f38a324e89547738f4b70cc33be5be2bc6da"
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          "url": "https://git.kernel.org/stable/c/519f4146b8b8c5f20c2ad01913acd6df2df8fc8e"
        },
        {
          "url": "https://git.kernel.org/stable/c/f574296be7f46eb60beca851240b526df232f480"
        }
      ],
      "title": "orangefs: fix double-free of trailer_buf on readdir copy failure",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89498",
    "datePublished": "2026-09-11T19:43:48.096Z",
    "dateReserved": "2026-09-11T19:38:34.714Z",
    "dateUpdated": "2026-10-19T08:47:49.902Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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