PT-2025-53054 · Linux · Linux Kernel

Published 2023-03-24 · Updated 2025-12-26 · CVE-2023-54056

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 related to kheaders. Specifically, the use of a 'char' declaration instead of an array declaration for kernel headers data could trigger a buffer overflow check within the memcpy() function when CONFIG FORTIFY SOURCE is enabled. This issue was observed when attempting to read the kheaders archive via '/sys/kernel/kheaders.tar.xz', leading to a kernel panic and a detected buffer overflow in memcpy at lib/string helpers.c. The issue occurs because the addresses are treated as byte arrays, and defining them as 'char' trips the size check.

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

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

BDU:2026-01249

CVE-2023-54056

Affected Products

Linux Kernel

References · 28

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54056.json · Exploit
• https://cve.org/CVERecord?id=CVE-2023-54056 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-54056 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-54056 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-54056 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01249 · Security Note
• https://ubuntu.com/security/CVE-2023-54056 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-54056 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-54056 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-54056 · Vendor Advisory
• https://git.kernel.org/stable/c/82d2e01b95c439fe55fab5e04fc83387c42d3a48 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.180 · Note
• https://git.kernel.org/stable/c/fcd2da2e6bf2640a31a2a5b118b50dc3635c707b · Note
• https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.15 · Note
• https://lore.kernel.org/linux-cve-announce/2025122426-CVE-2023-54056-fd56@gregkh · Note