{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47207","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-03-25T09:12:14.118Z","datePublished":"2024-04-10T18:56:39.655Z","dateUpdated":"2025-12-18T11:36:06.718Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-12-18T11:36:06.718Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: gus: fix null pointer dereference on pointer block\n\nThe pointer block return from snd_gf1_dma_next_block could be\nnull, so there is a potential null pointer dereference issue.\nFix this by adding a null check before dereference."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/isa/gus/gus_dma.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"3e28e083dcdf03a18a083f8a47b6bb6b1604b5be","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"cb09c760c201f82df83babc92a5ffea0a01807fc","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"542fa721594a02d2aee0370a764d306ef48d030c","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"ab4c1ebc40f699f48346f634d7b72b9c5193f315","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c6d2cefdd05c4810c416fb8d384b5c377bd977bc","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"1ac6cd87d8ddd36c43620f82c4d65b058f725f0f","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"16721797dcef2c7c030ffe73a07f39a65f9323c3","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a0d21bb3279476c777434c40d969ea88ca64f9aa","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/isa/gus/gus_dma.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"4.4.293","lessThanOrEqual":"4.4.*","status":"unaffected","versionType":"semver"},{"version":"4.9.291","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.256","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.218","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.162","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.82","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.5","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.4.293"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.9.291"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.14.256"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.19.218"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.4.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.82"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3e28e083dcdf03a18a083f8a47b6bb6b1604b5be"},{"url":"https://git.kernel.org/stable/c/cb09c760c201f82df83babc92a5ffea0a01807fc"},{"url":"https://git.kernel.org/stable/c/542fa721594a02d2aee0370a764d306ef48d030c"},{"url":"https://git.kernel.org/stable/c/ab4c1ebc40f699f48346f634d7b72b9c5193f315"},{"url":"https://git.kernel.org/stable/c/c6d2cefdd05c4810c416fb8d384b5c377bd977bc"},{"url":"https://git.kernel.org/stable/c/1ac6cd87d8ddd36c43620f82c4d65b058f725f0f"},{"url":"https://git.kernel.org/stable/c/16721797dcef2c7c030ffe73a07f39a65f9323c3"},{"url":"https://git.kernel.org/stable/c/a0d21bb3279476c777434c40d969ea88ca64f9aa"}],"title":"ALSA: 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