PT-2025-49677 · Linux · Linux Kernel

Published 2023-08-11 · Updated 2026-03-26 · CVE-2023-53817

Positive Technologies (AI Summary)

CVSS v2.0

4.6

Medium

Base vector

AV:L/AC:L/Au:S/C:N/I:N/A:C

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

Description A flaw exists in the Linux kernel's crypto/lib/mpi module, specifically within the mpi cmp ui() function, which can lead to a null pointer dereference. This issue occurs during NVMeTCP Authentication when a controller specifies the 8192-bit Diffie Hellman group and provides a zeroed Diffie Hellman value. The mpi cmp ui() function incorrectly handles this scenario, causing a dereference of the null pointer u->d.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2026-01459

CVE-2023-53817

OESA-2026-1231

SUSE-SU-2026:0962-1

SUSE-SU-2026:1041-1

SUSE-SU-2026:1078-1

SUSE-SU-2026:1081-1

SUSE-SU-2026:20667-1

SUSE-SU-2026:20720-1

SUSE-SU-2026:20845-1

SUSE-SU-2026:20876-1

Affected Products

Linux Kernel

References · 1542

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53817.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2022-50655 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53817 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53817 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-54014 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-50755 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-54091 · Security Note
• https://osv.dev/vulnerability/OESA-2026-1231 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53826 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-53821 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2023-53817 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1081-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-50884 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-50422 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:20845-1 · Vendor Advisory