{"id":"CVE-2023-53075","title":"ftrace: Fix invalid address access in lookup_rec() when index is 0","summary":"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 ff…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 2de28e5ce34b22b73b833a21e2c45ae3aade3964","Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 7569ee04b0e3b32df79f64db3a7138573edad9bc","Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < ac58b88ccbbb8e9fb83e137cee04a856b1ea6635","Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 83c3b2f4e7c61367c7b24551f4c6eb94bbdda283","Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 2a0d71fabfeb349216d33f001a6421b1768bd3a9","Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 4f84f31f63416b0f02fc146ffdc4ab32723eb7e8","Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < f1bd8b7fd890d87d0dc4dedc6287ea34dd07c0b4","Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < ee92fa443358f4fc0017c1d0d325c27b37802504","Linux 3.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:16:30.131235Z"},"published":"2025-05-02","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:20:58.969Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53075","references":[{"url":"https://git.kernel.org/stable/c/2de28e5ce34b22b73b833a21e2c45ae3aade3964"},{"url":"https://git.kernel.org/stable/c/7569ee04b0e3b32df79f64db3a7138573edad9bc"},{"url":"https://git.kernel.org/stable/c/ac58b88ccbbb8e9fb83e137cee04a856b1ea6635"},{"url":"https://git.kernel.org/stable/c/83c3b2f4e7c61367c7b24551f4c6eb94bbdda283"},{"url":"https://git.kernel.org/stable/c/2a0d71fabfeb349216d33f001a6421b1768bd3a9"},{"url":"https://git.kernel.org/stable/c/4f84f31f63416b0f02fc146ffdc4ab32723eb7e8"},{"url":"https://git.kernel.org/stable/c/f1bd8b7fd890d87d0dc4dedc6287ea34dd07c0b4"},{"url":"https://git.kernel.org/stable/c/ee92fa443358f4fc0017c1d0d325c27b37802504"}],"tags":["cve.org"],"epss":0.00206,"epssPercentile":0.10716,"ingestedAt":"2026-11-05T22:38:31.764Z","slug":"CVE-2023-53075","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 2de28e5ce34b22b73b833a21e2c45ae3aade3964`\n- `Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 7569ee04b0e3b32df79f64db3a7138573edad9bc`\n- `Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < ac58b88ccbbb8e9fb83e137cee04a856b1ea6635`\n- `Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 83c3b2f4e7c61367c7b24551f4c6eb94bbdda283`\n- `Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 2a0d71fabfeb349216d33f001a6421b1768bd3a9`\n- `Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < 4f84f31f63416b0f02fc146ffdc4ab32723eb7e8`\n- `Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < f1bd8b7fd890d87d0dc4dedc6287ea34dd07c0b4`\n- `Linux >= 9644302e3315e7e36495d230d5ac7125a316d33e < ee92fa443358f4fc0017c1d0d325c27b37802504`\n- `Linux 3.5`\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":[]}