{"cve":"CVE-2023-52810","nvd":{"published":"2024-05-21T16:15:19.270","modified":"2026-08-04T10:18:42.713","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/jfs: Add check for negative db_l2nbperpage\n\nl2nbperpage is log2(number of blks per page), and the minimum legal\nvalue should be 0, not negative.\n\nIn the case of l2nbperpage being negative, an error will occur\nwhen subsequently used as shift exponent.\n\nSyzbot reported this bug:\n\nUBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:799:12\nshift exponent -16777216 is negative","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-1335"],"references":["https://git.kernel.org/stable/c/0cb567e727339a192f9fd0db00781d73a91d15a6","https://git.kernel.org/stable/c/1a7c53fdea1d189087544d9a606d249e93c4934b","https://git.kernel.org/stable/c/491085258185ffc4fb91555b0dba895fe7656a45","https://git.kernel.org/stable/c/524b4f203afcf87accfe387e846f33f916f0c907","https://git.kernel.org/stable/c/525b861a008143048535011f3816d407940f4bfa"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2023-52810","score":0.00261,"percentile":0.17968,"date":"2026-10-31"},"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."]}