CVE-2023-52976

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]

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697	Patch
https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909	Patch
https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afc	Patch
https://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23c	Patch
https://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327e	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc5::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc6::::::

History

No history.

Information

Published : 2025-03-27 17:15

Updated : 2025-10-01 18:15

NVD link : CVE-2023-52976

Mitre link : CVE-2023-52976

CVE.ORG link : CVE-2023-52976

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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Al iterar en una lista enlazada, se desreferencia un resultado de memremap sin comprobar si es NULL. Este parche a\u00f1ade una comprobaci\u00f3n que recurre a la asignaci\u00f3n de una nueva p\u00e1gina en caso de que memremap no tenga \u00e9xito. Encontrado por el Centro de Verificaci\u00f3n de Linux (linuxtesting.org) con SVACE. 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