5.5

CVE-2023-52976

efi: fix potential NULL deref in efi_mem_reserve_persistent

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]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.1.16 < 5.4.232
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.168
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.93
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.11
Linux ≫ Linux Kernel Version6.2 Updaterc1
Linux ≫ Linux Kernel Version6.2 Updaterc2
Linux ≫ Linux Kernel Version6.2 Updaterc3
Linux ≫ Linux Kernel Version6.2 Updaterc4
Linux ≫ Linux Kernel Version6.2 Updaterc5
Linux ≫ Linux Kernel Version6.2 Updaterc6
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.27% 0.182
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
134c704f-9b21-4f2e-91b3-4a467353bcc0 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

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