{"id":"CVE-2021-47348","state":"PUBLISHED","title":"drm/amd/display: Avoid HDCP over-read and corruption","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Avoid HDCP over-read and corruption\n\nInstead of reading the desired 5 bytes of the actual target field,\nthe code was reading 8. This could result in a corrupted value if the\ntrailing 3 bytes were non-zero, so instead use an appropriately sized\nand zero-initialized bounce buffer, and read only 5 bytes before casting\nto u64.","publishedAt":"2024-05-21T14:35:53.613Z","updatedAt":"2026-05-11T13:52:57.796Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4c283fdac08abf3211533f70623c90a34f41d08d","status":"affected","lessThan":"c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e","versionType":"git"},{"version":"4c283fdac08abf3211533f70623c90a34f41d08d","status":"affected","lessThan":"44c7c901cb368a9f2493748f213b247b5872639f","versionType":"git"},{"version":"4c283fdac08abf3211533f70623c90a34f41d08d","status":"affected","lessThan":"3b2b93a485fb7a970bc8b5daef16f4cf579d172f","versionType":"git"},{"version":"4c283fdac08abf3211533f70623c90a34f41d08d","status":"affected","lessThan":"06888d571b513cbfc0b41949948def6cb81021b2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.51","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.12.18","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13.3","status":"unaffected","lessThanOrEqual":"5.13.*","versionType":"semver"},{"version":"5.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c"]}],"references":["https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e","https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f","https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f","https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2"],"weaknesses":["CWE-119"],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47348.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47348","state":"PUBLISHED","datePublished":"2024-05-21T14:35:53.613Z","dateUpdated":"2026-05-11T13:52:57.796Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T14:28:16.983Z"},"containers":{"cna":{"title":"drm/amd/display: Avoid HDCP over-read and corruption","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Avoid HDCP over-read and corruption\n\nInstead of reading the desired 5 bytes of the actual target field,\nthe code was reading 8. This could result in a corrupted value if the\ntrailing 3 bytes were non-zero, so instead use an appropriately sized\nand zero-initialized bounce buffer, and read only 5 bytes before casting\nto 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