GHSA-VQ76-XC8W-VP5G
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-10-30 15:33In the Linux kernel, the following vulnerability has been resolved:
media: zoran: Avoid freeing a registered video_device twice
zoran_init_video_device() installs zoran_vdev_release() as the video_device release callback through zoran_template. After video_register_device() succeeds, video_unregister_device() drops the registered video_device reference and the V4L2 core eventually invokes that release callback, which kfree()s the video_device.
zoran_exit_video_devices() called video_unregister_device() and then kfree(zr->video_dev), so device teardown could free the same video_device twice.
Remove the direct kfree() and clear the cached pointer after unregistering. The pre-registration failure path keeps its manual free because the video_device was not registered there.
This issue was found by a static analysis checker and confirmed by manual source review.
{
"affected": [],
"aliases": [
"CVE-2026-89870"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:16:55Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: zoran: Avoid freeing a registered video_device twice\n\nzoran_init_video_device() installs zoran_vdev_release() as the\nvideo_device release callback through zoran_template. After\nvideo_register_device() succeeds, video_unregister_device() drops the\nregistered video_device reference and the V4L2 core eventually invokes\nthat release callback, which kfree()s the video_device.\n\nzoran_exit_video_devices() called video_unregister_device() and then\nkfree(zr-\u003evideo_dev), so device teardown could free the same\nvideo_device twice.\n\nRemove the direct kfree() and clear the cached pointer after\nunregistering. The pre-registration failure path keeps its manual free\nbecause the video_device was not registered there.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review.",
"id": "GHSA-vq76-xc8w-vp5g",
"modified": "2026-10-30T15:33:29Z",
"published": "2026-09-16T12:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89870"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0735e0b5a96761a9ce277a238e834008ad92a0a5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29792762e65d4eefbe75b6048c59763fd844191a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3ad6cf27505017a6794f5f96c31218c2291e951b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4d99d8d0d895489064783601a516bd45812fa992"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/672dbccf4351370dad002d3c78dbb29ca1588f22"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/99277a387802eb6c1907c73f09d746908cc64913"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c4acac8cdc005b2d14b6cef5e215d264212857f3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f1c4f3885df1f09bcab5296d86834d104f865e86"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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