{"id":"CVE-2021-47164","state":"PUBLISHED","title":"net/mlx5e: Fix null deref accessing lag dev","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix null deref accessing lag dev\n\nIt could be the lag dev is null so stop processing the event.\nIn bond_enslave() the active/backup slave being set before setting the\nupper dev so first event is without an upper dev.\nAfter setting the upper dev with bond_master_upper_dev_link() there is\na second event and in that event we have an upper dev.","publishedAt":"2024-03-25T09:16:17.592Z","updatedAt":"2026-05-11T13:49:12.867Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7e51891a237f9ea319f53f9beb83afb0077d88e6","status":"affected","lessThan":"2e4b0b95a489259f9d35a3db17023061f8f3d587","versionType":"git"},{"version":"7e51891a237f9ea319f53f9beb83afb0077d88e6","status":"affected","lessThan":"bdfd3593a8248eea6ecfcbf7b47b56b86515672d","versionType":"git"},{"version":"7e51891a237f9ea319f53f9beb83afb0077d88e6","status":"affected","lessThan":"83026d83186bc48bb41ee4872f339b83f31dfc55","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en/rep/bond.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.10.42","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.12.9","status":"unaffected","lessThanOrEqual":"5.12.*","versionType":"semver"},{"version":"5.13","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/mellanox/mlx5/core/en/rep/bond.c"]}],"references":["https://git.kernel.org/stable/c/2e4b0b95a489259f9d35a3db17023061f8f3d587","https://git.kernel.org/stable/c/bdfd3593a8248eea6ecfcbf7b47b56b86515672d","https://git.kernel.org/stable/c/83026d83186bc48bb41ee4872f339b83f31dfc55"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47164.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47164","state":"PUBLISHED","datePublished":"2024-03-25T09:16:17.592Z","dateUpdated":"2026-05-11T13:49:12.867Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-25T09:12:14.109Z"},"containers":{"cna":{"title":"net/mlx5e: Fix null deref accessing lag dev","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix null deref accessing lag dev\n\nIt could be the lag dev is null so stop processing the event.\nIn bond_enslave() the active/backup slave being set before setting the\nupper dev so first event is without an upper dev.\nAfter setting the upper dev with bond_master_upper_dev_link() there is\na second event and in that event we have an upper 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