{"id":"CVE-2025-38692","state":"PUBLISHED","title":"exfat: add cluster chain loop check for dir","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: add cluster chain loop check for dir\n\nAn infinite loop may occur if the following conditions occur due to\nfile system corruption.\n\n(1) Condition for exfat_count_dir_entries() to loop infinitely.\n    - The cluster chain includes a loop.\n    - There is no UNUSED entry in the cluster chain.\n\n(2) Condition for exfat_create_upcase_table() to loop infinitely.\n    - The cluster chain of the root directory includes a loop.\n    - There are no UNUSED entry and up-case table entry in the cluster\n      chain of the root directory.\n\n(3) Condition for exfat_load_bitmap() to loop infinitely.\n    - The cluster chain of the root directory includes a loop.\n    - There are no UNUSED entry and bitmap entry in the cluster chain\n      of the root directory.\n\n(4) Condition for exfat_find_dir_entry() to loop infinitely.\n    - The cluster chain includes a loop.\n    - The unused directory entries were exhausted by some operation.\n\n(5) Condition for exfat_check_dir_empty() to loop infinitely.\n    - The cluster chain includes a loop.\n    - The unused directory entries were exhausted by some operation.\n    - All files and sub-directories under the directory are deleted.\n\nThis commit adds checks to break the above infinite loop.","publishedAt":"2025-09-04T15:32:46.004Z","updatedAt":"2026-10-30T12:22:12.663Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"1715f0996f7baf817c73613aeda500c4f73a6bd6","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"868f23286c1a13162330fa6c614fe350f78e3f82","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"aa8fe7b7b73d4c9a41bb96cb3fb3092f794ecb33","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"e2066ca3ef49a30920d8536fa366b2a183a808ee","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"4c3cda20c4cf1871e27868d08fda06b79bc7d568","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"99f9a97dce39ad413c39b92c90393bbd6778f3fd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/exfat/dir.c","fs/exfat/fatent.c","fs/exfat/namei.c","fs/exfat/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.103","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.43","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.11","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.2","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/exfat/dir.c","fs/exfat/fatent.c","fs/exfat/namei.c","fs/exfat/super.c"]}],"references":["https://git.kernel.org/stable/c/1715f0996f7baf817c73613aeda500c4f73a6bd6","https://git.kernel.org/stable/c/868f23286c1a13162330fa6c614fe350f78e3f82","https://git.kernel.org/stable/c/aa8fe7b7b73d4c9a41bb96cb3fb3092f794ecb33","https://git.kernel.org/stable/c/e2066ca3ef49a30920d8536fa366b2a183a808ee","https://git.kernel.org/stable/c/4c3cda20c4cf1871e27868d08fda06b79bc7d568","https://git.kernel.org/stable/c/99f9a97dce39ad413c39b92c90393bbd6778f3fd"],"weaknesses":[],"ingestedAt":"2026-10-30T12:38:04.623Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38692.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38692","state":"PUBLISHED","datePublished":"2025-09-04T15:32:46.004Z","dateUpdated":"2026-10-30T12:22:12.663Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:24.032Z"},"containers":{"cna":{"title":"exfat: add cluster chain loop check for dir","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: add cluster chain loop check for dir\n\nAn infinite loop may occur if the following conditions occur due to\nfile system corruption.\n\n(1) Condition for exfat_count_dir_entries() to loop infinitely.\n    - The cluster chain includes a loop.\n    - There is no UNUSED entry in the cluster chain.\n\n(2) Condition for exfat_create_upcase_table() to loop infinitely.\n    - The cluster chain of the root directory includes a loop.\n    - There are no UNUSED entry and up-case table entry in the cluster\n      chain of the root directory.\n\n(3) Condition for exfat_load_bitmap() to loop infinitely.\n    - The cluster chain of the root directory includes a loop.\n    - There are no UNUSED entry and bitmap entry in the cluster chain\n      of the root directory.\n\n(4) Condition for exfat_find_dir_entry() to loop infinitely.\n    - The cluster chain includes a loop.\n    - The unused directory entries were exhausted by some operation.\n\n(5) Condition for exfat_check_dir_empty() to loop infinitely.\n    - The cluster chain includes a loop.\n    - The unused directory entries were exhausted by some operation.\n    - All files and sub-directories under the directory are deleted.\n\nThis commit adds checks to break the above infinite loop."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"1715f0996f7baf817c73613aeda500c4f73a6bd6","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"868f23286c1a13162330fa6c614fe350f78e3f82","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"aa8fe7b7b73d4c9a41bb96cb3fb3092f794ecb33","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"e2066ca3ef49a30920d8536fa366b2a183a808ee","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"4c3cda20c4cf1871e27868d08fda06b79bc7d568","versionType":"git"},{"version":"1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003","status":"affected","lessThan":"99f9a97dce39ad413c39b92c90393bbd6778f3fd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/exfat/dir.c","fs/exfat/fatent.c","fs/exfat/namei.c","fs/exfat/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.103","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.43","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.11","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.2","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/exfat/dir.c","fs/exfat/fatent.c","fs/exfat/namei.c","fs/exfat/super.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1715f0996f7baf817c73613aeda500c4f73a6bd6"},{"url":"https://git.kernel.org/stable/c/868f23286c1a13162330fa6c614fe350f78e3f82"},{"url":"https://git.kernel.org/stable/c/aa8fe7b7b73d4c9a41bb96cb3fb3092f794ecb33"},{"url":"https://git.kernel.org/stable/c/e2066ca3ef49a30920d8536fa366b2a183a808ee"},{"url":"https://git.kernel.org/stable/c/4c3cda20c4cf1871e27868d08fda06b79bc7d568"},{"url":"https://git.kernel.org/stable/c/99f9a97dce39ad413c39b92c90393bbd6778f3fd"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:22:12.663Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.15.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.16.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}