Lucene search

K
vulnrichmentLinuxVULNRICHMENT:CVE-2024-41027
HistoryJul 29, 2024 - 2:31 p.m.

CVE-2024-41027 Fix userfaultfd_api to return EINVAL as expected

2024-07-2914:31:43
Linux
github.com
1
linux kernel
vulnerability resolved
userfaultfd_api
einval
kernel warning
uffd_feature_wp_unpopulated
kernel config
dell inc. poweredge r6525
bios 2.7.3

AI Score

6.6

Confidence

Low

SSVC

Exploitation

none

Automatable

no

Technical Impact

partial

In the Linux kernel, the following vulnerability has been resolved:

Fix userfaultfd_api to return EINVAL as expected

Currently if we request a feature that is not set in the Kernel config we
fail silently and return all the available features. However, the man
page indicates we should return an EINVAL.

We need to fix this issue since we can end up with a Kernel warning should
a program request the feature UFFD_FEATURE_WP_UNPOPULATED on a kernel with
the config not set with this feature.

[ 200.812896] WARNING: CPU: 91 PID: 13634 at mm/memory.c:1660 zap_pte_range+0x43d/0x660
[ 200.820738] Modules linked in:
[ 200.869387] CPU: 91 PID: 13634 Comm: userfaultfd Kdump: loaded Not tainted 6.9.0-rc5+ #8
[ 200.877477] Hardware name: Dell Inc. PowerEdge R6525/0N7YGH, BIOS 2.7.3 03/30/2022
[ 200.885052] RIP: 0010:zap_pte_range+0x43d/0x660

AI Score

6.6

Confidence

Low

SSVC

Exploitation

none

Automatable

no

Technical Impact

partial