GHSA-QVVF-F4G9-5P95
Vulnerability from github – Published: 2026-09-24 18:31 – Updated: 2026-09-24 18:31In the Linux kernel, the following vulnerability has been resolved:
cifs: validate idmap key payload length
The cifs.idmap key type stores its payload length in key->datalen, which is limited to U16_MAX. Accepting a larger key payload truncates the recorded length and can make later users interpret the payload using inconsistent bounds.
Reject oversized preparsed payloads before allocating or copying them. This keeps key->datalen consistent with the stored data for both inline and separately allocated idmap payloads.
{
"affected": [],
"aliases": [
"CVE-2026-93785"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-24T17:17:11Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: validate idmap key payload length\n\nThe cifs.idmap key type stores its payload length in key-\u003edatalen, which\nis limited to U16_MAX. Accepting a larger key payload truncates the\nrecorded length and can make later users interpret the payload using\ninconsistent bounds.\n\nReject oversized preparsed payloads before allocating or copying them.\nThis keeps key-\u003edatalen consistent with the stored data for both inline\nand separately allocated idmap payloads.",
"id": "GHSA-qvvf-f4g9-5p95",
"modified": "2026-09-24T18:31:29Z",
"published": "2026-09-24T18:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93785"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/455488cd5054bcc59db40fa1cc2c004031a5b2a5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6cfeef221ac00d63c07f6122f58e6159bde69ca0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8b12f65d7caf16d124098cb4895a203367d35b57"
}
],
"schema_version": "1.4.0",
"severity": []
}
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