{"id":"CVE-2021-47058","state":"PUBLISHED","title":"regmap: set debugfs_name to NULL after it is freed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: set debugfs_name to NULL after it is freed\n\nThere is a upstream commit cffa4b2122f5(\"regmap:debugfs:\nFix a memory leak when calling regmap_attach_dev\") that\nadds a if condition when create name for debugfs_name.\nWith below function invoking logical, debugfs_name is\nfreed in regmap_debugfs_exit(), but it is not created again\nbecause of the if condition introduced by above commit.\nregmap_reinit_cache()\n\tregmap_debugfs_exit()\n\t...\n\tregmap_debugfs_init()\nSo, set debugfs_name to NULL after it is freed.","publishedAt":"2024-02-29T22:37:33.232Z","updatedAt":"2026-05-23T15:19:11.297Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5b654b03007917f3f1015b2a5c288c1ea6ae8f65","status":"affected","lessThan":"2dc1554d5f0fdaf47cc5bea442b84b9226fea867","versionType":"git"},{"version":"480c5e9c7e4c76c01d5f1f7b73832d7b77e6b427","status":"affected","lessThan":"d8897f7b2283a500666c85ef06e820df38ed7b52","versionType":"git"},{"version":"c9698380b01aed3281160d3ab25749b57d6913b8","status":"affected","lessThan":"eb949f891226c012138ffd9df90d1e509f428ae6","versionType":"git"},{"version":"cffa4b2122f5f3e53cf3d529bbc74651f95856d5","status":"affected","lessThan":"c764e375ae647832de1ee73d43a4bb3ef8a8f43d","versionType":"git"},{"version":"cffa4b2122f5f3e53cf3d529bbc74651f95856d5","status":"affected","lessThan":"b9e569ae1da3a113b3acee8703c94777fd20938a","versionType":"git"},{"version":"cffa4b2122f5f3e53cf3d529bbc74651f95856d5","status":"affected","lessThan":"e41a962f82e7afb5b1ee644f48ad0b3aee656268","versionType":"git"},{"version":"4.19.168","status":"affected","lessThan":"4.19.191","versionType":"semver"},{"version":"5.4.90","status":"affected","lessThan":"5.4.119","versionType":"semver"},{"version":"5.10.8","status":"affected","lessThan":"5.10.37","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/regmap/regmap-debugfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.11","versionType":"semver"},{"version":"4.19.191","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.119","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.37","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.11.21","status":"unaffected","lessThanOrEqual":"5.11.*","versionType":"semver"},{"version":"5.12.4","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/base/regmap/regmap-debugfs.c"]}],"references":["https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867","https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52","https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6","https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d","https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a","https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47058.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47058","state":"PUBLISHED","datePublished":"2024-02-29T22:37:33.232Z","dateUpdated":"2026-05-23T15:19:11.297Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-29T22:33:44.294Z"},"containers":{"cna":{"title":"regmap: set debugfs_name to NULL after it is freed","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: set debugfs_name to NULL after it is freed\n\nThere is a upstream commit cffa4b2122f5(\"regmap:debugfs:\nFix a memory leak when calling regmap_attach_dev\") that\nadds a if condition when create name for debugfs_name.\nWith below function invoking logical, debugfs_name is\nfreed in regmap_debugfs_exit(), but it is not created again\nbecause of the if condition introduced by above commit.\nregmap_reinit_cache()\n\tregmap_debugfs_exit()\n\t...\n\tregmap_debugfs_init()\nSo, set debugfs_name to NULL after it is freed."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5b654b03007917f3f1015b2a5c288c1ea6ae8f65","status":"affected","lessThan":"2dc1554d5f0fdaf47cc5bea442b84b9226fea867","versionType":"git"},{"version":"480c5e9c7e4c76c01d5f1f7b73832d7b77e6b427","status":"affected","lessThan":"d8897f7b2283a500666c85ef06e820df38ed7b52","versionType":"git"},{"version":"c9698380b01aed3281160d3ab25749b57d6913b8","status":"affected","lessThan":"eb949f891226c012138ffd9df90d1e509f428ae6","versionType":"git"},{"version":"cffa4b2122f5f3e53cf3d529bbc74651f95856d5","status":"affected","lessThan":"c764e375ae647832de1ee73d43a4bb3ef8a8f43d","versionType":"git"},{"version":"cffa4b2122f5f3e53cf3d529bbc74651f95856d5","status":"affected","lessThan":"b9e569ae1da3a113b3acee8703c94777fd20938a","versionType":"git"},{"version":"cffa4b2122f5f3e53cf3d529bbc74651f95856d5","status":"affected","lessThan":"e41a962f82e7afb5b1ee644f48ad0b3aee656268","versionType":"git"},{"version":"4.19.168","status":"affected","lessThan":"4.19.191","versionType":"semver"},{"version":"5.4.90","status":"affected","lessThan":"5.4.119","versionType":"semver"},{"version":"5.10.8","status":"affected","lessThan":"5.10.37","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/base/regmap/regmap-debugfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.11","versionType":"semver"},{"version":"4.19.191","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.119","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.37","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.11.21","status":"unaffected","lessThanOrEqual":"5.11.*","versionType":"semver"},{"version":"5.12.4","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/base/regmap/regmap-debugfs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867"},{"url":"https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52"},{"url":"https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6"},{"url":"https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43d"},{"url":"https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938a"},{"url":"https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:19:11.297Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.168","versionEndExcluding":"4.19.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.90","versionEndExcluding":"5.4.119"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.8","versionEndExcluding":"5.10.37"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.11.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.12.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.13"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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