GHSA-RQ26-MW8F-3HJH
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-10-15 12:30In the Linux kernel, the following vulnerability has been resolved:
ublk: validate auto buf reg before taking uring_cmd
With UBLK_F_AUTO_BUF_REG, invalid sqe->addr can fail after ublk_fill_io_cmd() has set UBLK_IO_FLAG_ACTIVE. The uring_cmd is completed while the tag stays active, which can hang teardown.
Split validation from buffer apply so the check has no side effects, then take the uring_cmd and store the already-validated buffer. Apply the same order in FETCH so io->buf is not written before __ublk_fetch() state checks.
{
"affected": [],
"aliases": [
"CVE-2026-90323"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:30Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: validate auto buf reg before taking uring_cmd\n\nWith UBLK_F_AUTO_BUF_REG, invalid sqe-\u003eaddr can fail after\nublk_fill_io_cmd() has set UBLK_IO_FLAG_ACTIVE. The uring_cmd is\ncompleted while the tag stays active, which can hang teardown.\n\nSplit validation from buffer apply so the check has no side effects,\nthen take the uring_cmd and store the already-validated buffer. Apply\nthe same order in FETCH so io-\u003ebuf is not written before __ublk_fetch()\nstate checks.",
"id": "GHSA-rq26-mw8f-3hjh",
"modified": "2026-10-15T12:30:50Z",
"published": "2026-09-17T18:32:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90323"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/653d22269a8b83b491f7f186a5d7872f14e6ddca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8397942b67128e0b1275cfedb5abf4faafac5fd0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ca5a01eee34c7cbe0f531a613b0292a3ad1a419b"
}
],
"schema_version": "1.4.0",
"severity": []
}
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