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.
Does this matter?
Lower severity and a low EPSS score (0.28%). Track it; it rarely justifies an emergency change on its own.
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]
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.28% probability · 21th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697Patch
- https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909Patch
- https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afcPatch
- https://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23cPatch
- https://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327ePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.