CVE-2023-52976

efi: fix potential NULL deref in efi_mem_reserve_persistent

CVSS 5.5 MEDIUMEPSS 0.3%CWE-476

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

27 Mar 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Linux · Linux

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References

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