PT-2025-18875 · Linux+4 · Linux Kernel+4

Published 2023-03-14 · Updated 2026-03-14 · CVE-2023-53111

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to use-after-free problems in the Linux kernel. Specifically, the do req filebacked() function calls blk mq complete request() synchronously or asynchronously when using asynchronous I/O, unless memory allocation fails. To fix this, the loop handle cmd() function was modified to avoid dereferencing 'cmd' or 'rq' after do req filebacked() finishes, unless it is certain that the request has not been completed. This resolves a kernel crash caused by a NULL pointer dereference.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Buffer Overflow

Weakness Enumeration

CWE-416

CWE-119

Related Identifiers

BDU:2026-03745

CVE-2023-53111

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

Astra Linux

Debian

Linux Kernel

Red Os

Suse

References · 454

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53111.json · Exploit
• https://osv.dev/vulnerability/BELL-CVE-2023-53111 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53111 · Vendor Advisory
• https://git.kernel.org/stable/c/e3fda704903f6d1fc351412f1bc6620333959ada · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53111 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02173-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:01966-1 · Vendor Advisory
• https://git.kernel.org/stable/c/6917395c4667cfb607ed8bf1826205a59414657c · Patch
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-53111 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02262-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53111 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53111 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03745 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-53111 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:01918-1 · Vendor Advisory