CVE-2023-54056 Details
Description
In the Linux kernel, the following vulnerability has been resolved: kheaders: Use array declaration instead of char Under CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination and source buffers. Defining kernel_headers_data as "char" would trip this check. Since these addresses are treated as byte arrays, define them as arrays (as done everywhere else). This was seen with: $ cat /sys/kernel/kheaders.tar.xz >> /dev/null detected buffer overflow in memcpy kernel BUG at lib/string_helpers.c:1027! ... RIP: 0010:fortify_panic+0xf/0x20 [...] Call Trace: <TASK> ikheaders_read+0x45/0x50 [kheaders] kernfs_fop_read_iter+0x1a4/0x2f0 ...
A buffer overflow vulnerability has been identified in the Linux kernel's kheaders component. This issue arises because, under CONFIG_FORTIFY_SOURCE, the memcpy() function verifies the sizes of source and destination buffers. Defining kernel_headers_data as a 'char' can cause this check to fail. The vulnerability is present in the stable versions of the Linux kernel.
Users can upgrade to the latest stable version of the Linux kernel, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 24, 2025References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/4a07d2d511e2703efd4387891d49e0326f1157f3 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/719459877d58c8aced5845c1e5b98d8d87d09197 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/82d2e01b95c439fe55fab5e04fc83387c42d3a48 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/b9f6845a492de20679b84bda6b08be347c5819da | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/d6d1af6b8611801b585c53c0cc63626c8d339e96 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/fcd2da2e6bf2640a31a2a5b118b50dc3635c707b | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 24, 2025 | New CVE Received | kernel.org |