{"id":"CVE-2024-40938","state":"PUBLISHED","title":"landlock: Fix d_parent walk","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlandlock: Fix d_parent walk\n\nThe WARN_ON_ONCE() in collect_domain_accesses() can be triggered when\ntrying to link a root mount point.  This cannot work in practice because\nthis directory is mounted, but the VFS check is done after the call to\nsecurity_path_link().\n\nDo not use source directory's d_parent when the source directory is the\nmount point.\n\n[mic: Fix commit message]","publishedAt":"2024-07-12T12:25:14.463Z","updatedAt":"2026-05-11T20:22:44.692Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b91c3e4ea756b12b7d992529226edce1cfd854d7","status":"affected","lessThan":"b6e5e696435832b33e40775f060ef5c95f4fda1f","versionType":"git"},{"version":"b91c3e4ea756b12b7d992529226edce1cfd854d7","status":"affected","lessThan":"cc30d05b34f9a087a6928d09b131f7b491e9ab11","versionType":"git"},{"version":"b91c3e4ea756b12b7d992529226edce1cfd854d7","status":"affected","lessThan":"c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6","versionType":"git"},{"version":"b91c3e4ea756b12b7d992529226edce1cfd854d7","status":"affected","lessThan":"88da52ccd66e65f2e63a6c35c9dff55d448ef4dc","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/landlock/fs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.95","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.35","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.6","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/landlock/fs.c"]}],"references":["https://git.kernel.org/stable/c/b6e5e696435832b33e40775f060ef5c95f4fda1f","https://git.kernel.org/stable/c/cc30d05b34f9a087a6928d09b131f7b491e9ab11","https://git.kernel.org/stable/c/c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6","https://git.kernel.org/stable/c/88da52ccd66e65f2e63a6c35c9dff55d448ef4dc","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:39.287Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/40xxx/CVE-2024-40938.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-40938","state":"PUBLISHED","datePublished":"2024-07-12T12:25:14.463Z","dateUpdated":"2026-05-11T20:22:44.692Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-07-12T12:17:45.584Z"},"containers":{"cna":{"title":"landlock: Fix d_parent walk","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nlandlock: Fix d_parent walk\n\nThe WARN_ON_ONCE() in collect_domain_accesses() can be triggered when\ntrying to link a root mount point.  This cannot work in practice because\nthis directory is mounted, but the VFS check is done after the call to\nsecurity_path_link().\n\nDo not use source directory's d_parent when the source directory is the\nmount point.\n\n[mic: Fix commit message]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b91c3e4ea756b12b7d992529226edce1cfd854d7","status":"affected","lessThan":"b6e5e696435832b33e40775f060ef5c95f4fda1f","versionType":"git"},{"version":"b91c3e4ea756b12b7d992529226edce1cfd854d7","status":"affected","lessThan":"cc30d05b34f9a087a6928d09b131f7b491e9ab11","versionType":"git"},{"version":"b91c3e4ea756b12b7d992529226edce1cfd854d7","status":"affected","lessThan":"c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6","versionType":"git"},{"version":"b91c3e4ea756b12b7d992529226edce1cfd854d7","status":"affected","lessThan":"88da52ccd66e65f2e63a6c35c9dff55d448ef4dc","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/landlock/fs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"6.1.95","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.35","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.6","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/landlock/fs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/b6e5e696435832b33e40775f060ef5c95f4fda1f"},{"url":"https://git.kernel.org/stable/c/cc30d05b34f9a087a6928d09b131f7b491e9ab11"},{"url":"https://git.kernel.org/stable/c/c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6"},{"url":"https://git.kernel.org/stable/c/88da52ccd66e65f2e63a6c35c9dff55d448ef4dc"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:22:44.692Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.9.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.10"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/b6e5e696435832b33e40775f060ef5c95f4fda1f","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/cc30d05b34f9a087a6928d09b131f7b491e9ab11","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/88da52ccd66e65f2e63a6c35c9dff55d448ef4dc","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T21:58:05.436Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-40938","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T17:04:36.699030Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:34:26.368Z"}}]}}}