{"id":"CVE-2021-47108","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-47108","generatedAt":"2026-10-27T19:57:39.024Z","title":"In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: hdmi: Perform NULL pointer check for mtk_hdmi_conf In commit 41ca9caaae0b (\"drm/mediatek: hdmi: Add check for CEA modes only\") a check for CEA modes was added to function…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: hdmi: Perform NULL pointer check for mtk_hdmi_conf\n\nIn commit 41ca9caaae0b\n(\"drm/mediatek: hdmi: Add check for CEA modes only\") a check\nfor CEA modes was added to function mtk_hdmi_bridge_mode_valid()\nin order to address possible issues on MT8167;\nmoreover, with commit c91026a938c2\n(\"drm/mediatek: hdmi: Add optional limit on maximal HDMI mode clock\")\nanother similar check was introduced.\n\nUnfortunately though, at the time of writing, MT8173 does not provide\nany mtk_hdmi_conf structure and this is crashing the kernel with NULL\npointer upon entering mtk_hdmi_bridge_mode_valid(), which happens as\nsoon as a HDMI cable gets plugged in.\n\nTo fix this regression, add a NULL pointer check for hdmi->conf in the\nsaid function, restoring HDMI functionality and avoiding NULL pointer\nkernel panics.","published":"2024-03-04T19:15:19.000Z","lastModified":"2026-06-17T04:16:31.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-476"],"affected":["linux/linux kernel"],"epss":{"score":0.00198,"percentile":0.09461,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/3b8e19a0aa3933a785be9f1541afd8d398c4ec69","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/71d07ebc5000b9c1d140e99e7493b0bafa954776","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3b8e19a0aa3933a785be9f1541afd8d398c4ec69","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/71d07ebc5000b9c1d140e99e7493b0bafa954776","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-47108","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}