PT-2025-18857 · Linux+3 · Linux Kernel+3

Published 2025-05-02 · Updated 2026-04-20 · CVE-2023-53093

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to the fixed version

Description A bug in the Linux kernel's histogram code allowed histogram values to have certain modifiers, which caused a bug. The issue occurred when attempting to set a histogram value to a string, stacktrace, graph, symbol, syscall, or grouped in buckets or log, resulting in a kernel NULL pointer dereference. The estimated number of potentially affected devices is not provided. There is no information about real-world incidents where this issue was exploited.

Technical details about exploitation include:

• API Endpoints: /sys/kernel/tracing/kprobe events and /sys/kernel/tracing/events/kprobes/copy to user/trigger
• Vulnerable Parameters or Variables: n, hitcount.buckets, sort
• Function Names: hist field name.part.0, hist field print, event hist trigger print, hist show

Recommendations For Linux kernel versions prior to the fixed version: update to a version that includes the fix for this issue. As a temporary workaround, consider restricting access to the /sys/kernel/tracing/ directory to minimize the risk of exploitation. Avoid using the n and hitcount.buckets parameters in the affected API endpoints until the issue is resolved.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

AZL-70135

BDU:2026-05865

CVE-2023-53093

OESA-2025-1514

OESA-2025-1515

SUSE-SU-2025:01918-1

SUSE-SU-2025:01966-1

SUSE-SU-2025:02173-1

SUSE-SU-2025:02262-1

SUSE-SU-2025:2173-1

SUSE-SU-2025_02173-1

SUSE-SU-2025_02262-1

Affected Products

Debian

Linux Kernel

Red Os

Suse

References · 459

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53093.json · Exploit
• https://git.kernel.org/stable/c/e0213434fe3e4a0d118923dc98d31e7ff1cd9e45 · Patch
• https://osv.dev/vulnerability/AZL-70135 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49901 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-53093 · Security Note
• https://osv.dev/vulnerability/OESA-2025-1514 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:01966-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53093 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-1515 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53093 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-23144 · Security Note
• https://git.kernel.org/stable/c/2fc0ee435c9264cdb7c5e872f76cd9bb97640227 · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2023-53093 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02262-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21999 · Security Note