GHSA-Q353-PRFJ-6JCP
Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-03-13 21:31In the Linux kernel, the following vulnerability has been resolved:
uacce: ensure safe queue release with state management
Directly calling put_queue carries risks since it cannot
guarantee that resources of uacce_queue have been fully released
beforehand. So adding a stop_queue operation for the
UACCE_CMD_PUT_Q command and leaving the put_queue operation to
the final resource release ensures safety.
Queue states are defined as follows:
- UACCE_Q_ZOMBIE: Initial state
- UACCE_Q_INIT: After opening uacce
- UACCE_Q_STARTED: After start is issued via ioctl
When executing poweroff -f in virt while accelerator are still
working, uacce_fops_release and uacce_remove may execute
concurrently. This can cause uacce_put_queue within
uacce_fops_release to access a NULL ops pointer. Therefore, add
state checks to prevent accessing freed pointers.
{
"affected": [],
"aliases": [
"CVE-2026-23063"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-04T17:16:16Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nuacce: ensure safe queue release with state management\n\nDirectly calling `put_queue` carries risks since it cannot\nguarantee that resources of `uacce_queue` have been fully released\nbeforehand. So adding a `stop_queue` operation for the\nUACCE_CMD_PUT_Q command and leaving the `put_queue` operation to\nthe final resource release ensures safety.\n\nQueue states are defined as follows:\n- UACCE_Q_ZOMBIE: Initial state\n- UACCE_Q_INIT: After opening `uacce`\n- UACCE_Q_STARTED: After `start` is issued via `ioctl`\n\nWhen executing `poweroff -f` in virt while accelerator are still\nworking, `uacce_fops_release` and `uacce_remove` may execute\nconcurrently. This can cause `uacce_put_queue` within\n`uacce_fops_release` to access a NULL `ops` pointer. Therefore, add\nstate checks to prevent accessing freed pointers.",
"id": "GHSA-q353-prfj-6jcp",
"modified": "2026-03-13T21:31:40Z",
"published": "2026-02-04T18:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23063"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/26c08dabe5475d99a13f353d8dd70e518de45663"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/336fb41a186e7c0415ae94fec9e23d1f04b87483"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/43f233eb6e7b9d88536881a9bc43726d0e34800d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/47634d70073890c9c37e39ab4ff93d4b585b028a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8b57bf1d3b1db692f34bce694a03e41be79f6016"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/92e4f11e29b98ef424ff72d6371acac03e5d973c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b457abeb5d962db88aaf60e249402fd3073dbfab"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
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|---|
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