ghsa-j2qm-vfcf-p3gj
Vulnerability from github
Published
2024-06-20 12:31
Modified
2024-06-20 12:31
Details
In the Linux kernel, the following vulnerability has been resolved:
drm/vmwgfx: Fix stale file descriptors on failed usercopy
A failing usercopy of the fence_rep object will lead to a stale entry in the file descriptor table as put_unused_fd() won't release it. This enables userland to refer to a dangling 'file' object through that still valid file descriptor, leading to all kinds of use-after-free exploitation scenarios.
Fix this by deferring the call to fd_install() until after the usercopy has succeeded.
{
"affected": [],
"aliases": [
"CVE-2022-48771"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-20T12:15:15Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Fix stale file descriptors on failed usercopy\n\nA failing usercopy of the fence_rep object will lead to a stale entry in\nthe file descriptor table as put_unused_fd() won\u0027t release it. This\nenables userland to refer to a dangling \u0027file\u0027 object through that still\nvalid file descriptor, leading to all kinds of use-after-free\nexploitation scenarios.\n\nFix this by deferring the call to fd_install() until after the usercopy\nhas succeeded.",
"id": "GHSA-j2qm-vfcf-p3gj",
"modified": "2024-06-20T12:31:22Z",
"published": "2024-06-20T12:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48771"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516"
}
],
"schema_version": "1.4.0",
"severity": []
}
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