PT-2025-43103 · Linux · Linux Kernel

Published 2023-05-15 · Updated 2026-05-26 · CVE-2023-53702

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 versions prior to 6.3.0-rc7+

Description The Linux kernel contains a flaw in the s390/crypto component related to ChaCha20. Specifically, the code lacks a check to verify if the necessary vector instructions are available before branching into the assembler code. If the kernel is compiled without vector instruction support, this can lead to a data exception and a kernel panic. The issue occurs when the chacha20 vx function is called, potentially causing a system crash.

Recommendations Versions prior to 6.3.0-rc7 should be updated.

Exploit

Fix

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

BDU:2026-04007

CVE-2023-53702

RHSA-2024:9315

Affected Products

Linux Kernel

References · 21

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53702.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2023-53702 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53702 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53702 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53702 · Security Note
• https://osv.dev/vulnerability/CVE-2023-53702 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53702 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2023-53702 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-04007 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53702 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53702 · Security Note
• https://lore.kernel.org/linux-cve-announce/2025102211-CVE-2023-53702-a6b6@gregkh/T · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://access.redhat.com/security/cve/cve-2023-53702 · Note
• https://git.kernel.org/linus/8703dd6b238da0ec6c276e53836f8200983d3d9b · Note