CVE-2023-53075

ftrace: Fix invalid address access in lookup_rec() when index is 0

HIGH

7.8

CVSS Score

Published: May 2, 2025 at 03:55 PM UTC

Updated: June 17, 2026 at 06:44 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7.8

Exploit prediction

EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix invalid address access in lookup_rec() when index is 0 KASAN reported follow problem: BUG: KASAN: use-after-free in lookup_rec Read of size 8 at addr ffff000199270ff0 by task modprobe CPU: 2 Comm: modprobe Call trace: kasan_report __asan_load8 lookup_rec ftrace_location arch_check_ftrace_location check_kprobe_address_safe register_kprobe When checking pg->records[pg->index - 1].ip in lookup_rec(), it can get a pg which is newly added to ftrace_pages_start in ftrace_process_locs(). Before the first pg->index++, index is 0 and accessing pg->records[-1].ip will cause this problem. Don't check the ip when pg->index is 0.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

3.5 ≤ v < 4.14.3113.5 ≤ v < 4.19.2793.5 ≤ v < 5.10.1763.5 ≤ v < 5.15.1043.5 ≤ v < 5.4.2383.5 ≤ v < 6.1.213.5 ≤ v < 6.2.83.5 ≤ v < 6.34.15 ≤ v < 4.19.2794.20 ≤ v < 5.4.2385.11 ≤ v < 5.15.1045.16 ≤ v < 6.1.215.5 ≤ v < 5.10.1766.2 ≤ v < 6.2.83.5 6.3 rc1 6.3 rc29644302e3315e7e36495d230d5ac7125a316d33e

Vendor states this is fixed in 2a0d71fabfeb349216d33f001a6421b1768bd3a9 (fixed)

Vendor states this is fixed in 2de28e5ce34b22b73b833a21e2c45ae3aade3964 (fixed)

Vendor states this is fixed in 4f84f31f63416b0f02fc146ffdc4ab32723eb7e8 (fixed)

Vendor states this is fixed in 7569ee04b0e3b32df79f64db3a7138573edad9bc (fixed)

Vendor states this is fixed in 83c3b2f4e7c61367c7b24551f4c6eb94bbdda283 (fixed)

Vendor states this is fixed in ac58b88ccbbb8e9fb83e137cee04a856b1ea6635 (fixed)

Vendor states this is fixed in ee92fa443358f4fc0017c1d0d325c27b37802504 (fixed)

Vendor states this is fixed in f1bd8b7fd890d87d0dc4dedc6287ea34dd07c0b4 (fixed)

Vendor states this is fixed in 3.5 (unaffected)

Vendor states this is fixed in 4.14.311 (unaffected)

Vendor states this is fixed in 4.19.279 (unaffected)

Vendor states this is fixed in 5.10.176 (unaffected)