CVE-2023-52976 Details
Description
In the Linux kernel, the following vulnerability has been resolved: efi: fix potential NULL deref in efi_mem_reserve_persistent When iterating on a linked list, a result of memremap is dereferenced without checking it for NULL. This patch adds a check that falls back on allocating a new page in case memremap doesn't succeed. Found by Linux Verification Center (linuxtesting.org) with SVACE. [ardb: return -ENOMEM instead of breaking out of the loop]
A vulnerability in the Linux kernel's EFI memory reservation handling can lead to a NULL pointer dereference. This issue arises when the code iterates over a linked list and dereferences the result of the 'memremap' function without checking for NULL. The vulnerability has been addressed by adding a NULL check and allocating a new page if 'memremap' fails. This issue was identified by the Linux Verification Center using SVACE.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Oct 1, 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/87d4ff18738fd71e7e3c10827c80257da6283697 | kernel.org | Patch |
| https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afc | kernel.org | Patch |
| https://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c | kernel.org | Patch |
| https://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327e | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
| CWE-476 | NULL Pointer Dereference | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.1.16, < 5.4.232 >= 5.5, < 5.10.168 >= 5.11, < 5.15.93 >= 5.16, < 6.1.11 6.2 rc1 6.2 rc2 6.2 rc3 6.2 rc4 6.2 rc5 6.2 rc6 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Oct 1, 2025 | CVE Modified | CISA-ADP |
| Apr 15, 2025 | Initial Analysis | [email protected] |
| Mar 27, 2025 | New CVE Received | kernel.org |