{"cve":"CVE-2023-52804","nvd":{"published":"2024-05-21T16:15:18.820","modified":"2026-08-04T10:18:42.377","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/jfs: Add validity check for db_maxag and db_agpref\n\nBoth db_maxag and db_agpref are used as the index of the\ndb_agfree array, but there is currently no validity check for\ndb_maxag and db_agpref, which can lead to errors.\n\nThe following is related bug reported by Syzbot:\n\nUBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:639:20\nindex 7936 is out of range for type 'atomic_t[128]'\n\nAdd checking that the values of db_maxag and db_agpref are valid\nindexes for the db_agfree array.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-129"],"references":["https://git.kernel.org/stable/c/1f74d336990f37703a8eee77153463d65b67f70e","https://git.kernel.org/stable/c/2323de34a3ae61a9f9b544c18583f71cea86721f","https://git.kernel.org/stable/c/32bd8f1cbcf8b663e29dd1f908ba3a129541a11b","https://git.kernel.org/stable/c/5013f8269887642cca784adc8db9b5f0b771533f","https://git.kernel.org/stable/c/64933ab7b04881c6c18b21ff206c12278341c72e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2023-52804","score":0.00257,"percentile":0.17385,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}