{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47579","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-24T15:11:00.730Z","datePublished":"2024-06-19T14:53:46.750Z","dateUpdated":"2025-12-18T11:37:58.819Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-12-18T11:37:58.819Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix warning in ovl_create_real()\n\nSyzbot triggered the following warning in ovl_workdir_create() ->\novl_create_real():\n\n\tif (!err && WARN_ON(!newdentry->d_inode)) {\n\nThe reason is that the cgroup2 filesystem returns from mkdir without\ninstantiating the new dentry.\n\nWeird filesystems such as this will be rejected by overlayfs at a later\nstage during setup, but to prevent such a warning, call ovl_mkdir_real()\ndirectly from ovl_workdir_create() and reject this case early."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/overlayfs/dir.c","fs/overlayfs/overlayfs.h","fs/overlayfs/super.c"],"versions":[{"version":"e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c","lessThan":"445d2dc63e5871d218f21b8f62ab29ac72f2e6b8","status":"affected","versionType":"git"},{"version":"e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c","lessThan":"f9f300a92297be8250547347fd52216ef0177ae0","status":"affected","versionType":"git"},{"version":"e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c","lessThan":"6859985a2fbda5d1586bf44538853e1be69e85f7","status":"affected","versionType":"git"},{"version":"e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c","lessThan":"d2ccdd4e4efab06178608a34d7bfb20a54104c02","status":"affected","versionType":"git"},{"version":"e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c","lessThan":"1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/overlayfs/dir.c","fs/overlayfs/overlayfs.h","fs/overlayfs/super.c"],"versions":[{"version":"3.18","status":"affected"},{"version":"0","lessThan":"3.18","status":"unaffected","versionType":"semver"},{"version":"4.19.222","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.168","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.88","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.11","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":"3.18","versionEndExcluding":"4.19.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.4.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.10.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.15.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18","versionEndExcluding":"5.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/445d2dc63e5871d218f21b8f62ab29ac72f2e6b8"},{"url":"https://git.kernel.org/stable/c/f9f300a92297be8250547347fd52216ef0177ae0"},{"url":"https://git.kernel.org/stable/c/6859985a2fbda5d1586bf44538853e1be69e85f7"},{"url":"https://git.kernel.org/stable/c/d2ccdd4e4efab06178608a34d7bfb20a54104c02"},{"url":"https://git.kernel.org/stable/c/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c"}],"title":"ovl: fix warning in ovl_create_real()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.680Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/445d2dc63e5871d218f21b8f62ab29ac72f2e6b8","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f9f300a92297be8250547347fd52216ef0177ae0","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/6859985a2fbda5d1586bf44538853e1be69e85f7","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/d2ccdd4e4efab06178608a34d7bfb20a54104c02","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/1f5573cfe7a7056e80a92c7a037a3e69f3a13d1c","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47579","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T17:12:49.599246Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:34:52.936Z"}}]}}