efi: fix potential NULL deref in efi_mem_reserve_persistent
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.5epss 0.3%
exploitation probability
0.3%top 82% of all CVEs
observed exploitation
nono source reports it
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 · LinuxReferences
https://git.kernel.org/stable/c/87d4ff18738fd71e7e3c10827c80257da6283697https://git.kernel.org/stable/c/966d47e1f27c45507c5df82b2a2157e5a4fd3909https://git.kernel.org/stable/c/a2e6a9ff89f13666a1c3ff7195612ab949ea9afchttps://git.kernel.org/stable/c/d8fc0b5fb3e816a4a8684bcd3ed02cbef0fce23chttps://git.kernel.org/stable/c/d92a25627bcdf264183670da73c9a60c0bac327e