GHSA-9G9C-4VJC-CW83
Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-14 15:32In 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.
{
"affected": [],
"aliases": [
"CVE-2026-89498"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-11T20:19:31Z",
"severity": null
},
"details": "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.",
"id": "GHSA-9g9c-4vjc-cw83",
"modified": "2026-09-14T15:32:27Z",
"published": "2026-09-11T21:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89498"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2f5454a25127854c232fde5d1d65d16fbcd42d43"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/433c2e470053cc9c712314d3d8c3dfbc862d68eb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/519f4146b8b8c5f20c2ad01913acd6df2df8fc8e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/712c4235fcc73c11a2f1d59a499d489e49c374a4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f574296be7f46eb60beca851240b526df232f480"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f796f38a324e89547738f4b70cc33be5be2bc6da"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date | Other |
|---|
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