GHSA-572V-238R-MQG6
Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix the possible bioc_list memory leak during error
There are two possible ways to leak bioc memory on btrfs_ordered_extent::bioc_list:
-
An error occurred for btrfs_insert_one_raid_extent() Then the function btrfs_insert_raid_extent() immediately return without freeing any bioc in the bioc_list.
-
An ordered extent hit an IO error In that case the ordered extent will have BTRFS_ORDERED_IOERR set, and skip the call on btrfs_insert_raid_extent() completely.
Fix the problem by:
-
Introduce a new helper, btrfs_cleanup_ordered_bioc_list() Which will remove all bioc from the bioc_list, and release the bioc.
-
Call the above helper for btrfs_insert_raid_extent() So that the cleanup helper is always called no matter what.
-
Call the above helper for btrfs_finish_one_ordered() This is called just before the final release on the ordered extent.
This was reported by Sashiko when reviewing another patch.
{
"affected": [],
"aliases": [
"CVE-2026-98082"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-25T11:17:37Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix the possible bioc_list memory leak during error\n\nThere are two possible ways to leak bioc memory on\nbtrfs_ordered_extent::bioc_list:\n\n- An error occurred for btrfs_insert_one_raid_extent()\n Then the function btrfs_insert_raid_extent() immediately return\n without freeing any bioc in the bioc_list.\n\n- An ordered extent hit an IO error\n In that case the ordered extent will have BTRFS_ORDERED_IOERR set, and\n skip the call on btrfs_insert_raid_extent() completely.\n\nFix the problem by:\n\n- Introduce a new helper, btrfs_cleanup_ordered_bioc_list()\n Which will remove all bioc from the bioc_list, and release the bioc.\n\n- Call the above helper for btrfs_insert_raid_extent()\n So that the cleanup helper is always called no matter what.\n\n- Call the above helper for btrfs_finish_one_ordered()\n This is called just before the final release on the ordered extent.\n\nThis was reported by Sashiko when reviewing another patch.",
"id": "GHSA-572v-238r-mqg6",
"modified": "2026-09-25T12:31:36Z",
"published": "2026-09-25T12:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98082"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1b4d4e890c2c85d0f6365b5a08c48b4bbf85deb0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/83f0c973cffb184d019390ffdb5d31de5c85bc61"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/afbe73778338e6d1ac8c4486fbdf33f0cc1f2624"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bb4da45766d16503821f167054db76b735d89e94"
}
],
"schema_version": "1.4.0",
"severity": []
}
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