{"cve":"CVE-2023-53075","nvd":{"published":"2025-05-02T16:15:26.510","modified":"2026-06-17T06:44:14.840","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix invalid address access in lookup_rec() when index is 0\n\nKASAN reported follow problem:\n\n BUG: KASAN: use-after-free in lookup_rec\n Read of size 8 at addr ffff000199270ff0 by task modprobe\n CPU: 2 Comm: modprobe\n Call trace:\n  kasan_report\n  __asan_load8\n  lookup_rec\n  ftrace_location\n  arch_check_ftrace_location\n  check_kprobe_address_safe\n  register_kprobe\n\nWhen checking pg->records[pg->index - 1].ip in lookup_rec(), it can get a\npg which is newly added to ftrace_pages_start in ftrace_process_locs().\nBefore the first pg->index++, index is 0 and accessing pg->records[-1].ip\nwill cause this problem.\n\nDon't check the ip when pg->index is 0.","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-416"],"references":["https://git.kernel.org/stable/c/2a0d71fabfeb349216d33f001a6421b1768bd3a9","https://git.kernel.org/stable/c/2de28e5ce34b22b73b833a21e2c45ae3aade3964","https://git.kernel.org/stable/c/4f84f31f63416b0f02fc146ffdc4ab32723eb7e8","https://git.kernel.org/stable/c/7569ee04b0e3b32df79f64db3a7138573edad9bc","https://git.kernel.org/stable/c/83c3b2f4e7c61367c7b24551f4c6eb94bbdda283"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:22.920403922+00:00"},"epss":{"cve":"CVE-2023-53075","score":0.00206,"percentile":0.10675,"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."]}