{"id":"CVE-2025-38692","title":"exfat: add cluster chain loop check for dir","summary":"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_…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < 1715f0996f7baf817c73613aeda500c4f73a6bd6","Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < 868f23286c1a13162330fa6c614fe350f78e3f82","Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < aa8fe7b7b73d4c9a41bb96cb3fb3092f794ecb33","Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < e2066ca3ef49a30920d8536fa366b2a183a808ee","Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < 4c3cda20c4cf1871e27868d08fda06b79bc7d568","Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < 99f9a97dce39ad413c39b92c90393bbd6778f3fd","Linux 5.7"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:07:19.990218Z"},"published":"2025-09-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:12:53.072Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38692","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"}],"tags":["cve.org"],"epss":0.00166,"epssPercentile":0.05914,"ingestedAt":"2026-11-03T19:53:18.504Z","slug":"CVE-2025-38692","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < 1715f0996f7baf817c73613aeda500c4f73a6bd6`\n- `Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < 868f23286c1a13162330fa6c614fe350f78e3f82`\n- `Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < aa8fe7b7b73d4c9a41bb96cb3fb3092f794ecb33`\n- `Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < e2066ca3ef49a30920d8536fa366b2a183a808ee`\n- `Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < 4c3cda20c4cf1871e27868d08fda06b79bc7d568`\n- `Linux >= 1acf1a564b6034b5af1e7fb23cb98cb3bb4f6003 < 99f9a97dce39ad413c39b92c90393bbd6778f3fd`\n- `Linux 5.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}