GHSA-WQ4C-35XC-P7XQ
Vulnerability from github – Published: 2025-10-21 12:31 – Updated: 2025-10-21 12:31In the Linux kernel, the following vulnerability has been resolved:
drm/mediatek: Add vblank register/unregister callback functions
We encountered a kernel panic issue that callback data will be NULL when it's using in ovl irq handler. There is a timing issue between mtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().
To resolve this issue, we use the flow to register/unregister vblank cb: - Register callback function and callback data when crtc creates. - Unregister callback function and callback data when crtc destroies.
With this solution, we can assure callback data will not be NULL when vblank is disable.
{
"affected": [],
"aliases": [
"CVE-2022-49506"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:01:26Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Add vblank register/unregister callback functions\n\nWe encountered a kernel panic issue that callback data will be NULL when\nit\u0027s using in ovl irq handler. There is a timing issue between\nmtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().\n\nTo resolve this issue, we use the flow to register/unregister vblank cb:\n- Register callback function and callback data when crtc creates.\n- Unregister callback function and callback data when crtc destroies.\n\nWith this solution, we can assure callback data will not be NULL when\nvblank is disable.",
"id": "GHSA-wq4c-35xc-p7xq",
"modified": "2025-10-21T12:31:26Z",
"published": "2025-10-21T12:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49506"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3a4027b5971fe2a94e32754f007d9d3c12c68ad1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8a265d9838bc3c63579002d55c2b2c655c4f8f26"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8a2dbdeccef6de47565638abdf3c25f41cdffc37"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b74d921b900b6ce38c6247c0a1c86be9f3746493"
}
],
"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"
}
]
}
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