{"id":"CVE-2021-47311","state":"PUBLISHED","title":"net: qcom/emac: fix UAF in emac_remove","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qcom/emac: fix UAF in emac_remove\n\nadpt is netdev private data and it cannot be\nused after free_netdev() call. Using adpt after free_netdev()\ncan cause UAF bug. Fix it by moving free_netdev() at the end of the\nfunction.","publishedAt":"2024-05-21T14:35:29.304Z","updatedAt":"2026-05-11T13:52:02.532Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"54e19bc74f3380d414681762ceed9f7245bc6a6e","status":"affected","lessThan":"4d04a42b926e682140776e54188f4a44f1f01a81","versionType":"git"},{"version":"54e19bc74f3380d414681762ceed9f7245bc6a6e","status":"affected","lessThan":"b1e091331920f8fbfc747dcbd16263fcd71abb2d","versionType":"git"},{"version":"54e19bc74f3380d414681762ceed9f7245bc6a6e","status":"affected","lessThan":"11e9d163d631198bb3eb41a677a61b499516c0f7","versionType":"git"},{"version":"54e19bc74f3380d414681762ceed9f7245bc6a6e","status":"affected","lessThan":"2b70ca92847c619d6264c7372ef74fcbfd1e048c","versionType":"git"},{"version":"54e19bc74f3380d414681762ceed9f7245bc6a6e","status":"affected","lessThan":"b560521eca03d0a2db6093a5a632cbdd0a0cf833","versionType":"git"},{"version":"54e19bc74f3380d414681762ceed9f7245bc6a6e","status":"affected","lessThan":"8a225a6e07a57a1538d53637cb3d82bd3e477839","versionType":"git"},{"version":"54e19bc74f3380d414681762ceed9f7245bc6a6e","status":"affected","lessThan":"ad297cd2db8953e2202970e9504cab247b6c7cb4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/qualcomm/emac/emac.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.9","versionType":"semver"},{"version":"4.9.277","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.241","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.199","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.135","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.53","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.13.5","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/net/ethernet/qualcomm/emac/emac.c"]}],"references":["https://git.kernel.org/stable/c/4d04a42b926e682140776e54188f4a44f1f01a81","https://git.kernel.org/stable/c/b1e091331920f8fbfc747dcbd16263fcd71abb2d","https://git.kernel.org/stable/c/11e9d163d631198bb3eb41a677a61b499516c0f7","https://git.kernel.org/stable/c/2b70ca92847c619d6264c7372ef74fcbfd1e048c","https://git.kernel.org/stable/c/b560521eca03d0a2db6093a5a632cbdd0a0cf833","https://git.kernel.org/stable/c/8a225a6e07a57a1538d53637cb3d82bd3e477839","https://git.kernel.org/stable/c/ad297cd2db8953e2202970e9504cab247b6c7cb4"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47311.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47311","state":"PUBLISHED","datePublished":"2024-05-21T14:35:29.304Z","dateUpdated":"2026-05-11T13:52:02.532Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T14:28:16.973Z"},"containers":{"cna":{"title":"net: qcom/emac: fix UAF in emac_remove","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qcom/emac: fix UAF in emac_remove\n\nadpt is netdev private data and it cannot be\nused after free_netdev() call. Using adpt after free_netdev()\ncan cause UAF bug. Fix it by moving free_netdev() at the end of 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