CVE-2023-2008

Kernel: udmabuf: improper validation of array index leading to local privilege escalation

State: Published
Severity: 8.2 High
Published: Apr 14, 2023
Updated: Aug 10, 2026
Reserved: Apr 12, 2023

Description

A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.

Scores

CVSS	Score	Vector	Source
3.1	8.2 High	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H	redhat
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-129 Improper Validation of Array Index

Affected Products

Product	Versions
kernelLinux	4.20 to before 5.4.202Affected 5.5 to before 5.10.127Affected 5.11 to before 5.15.51Affected 5.16 to before 5.18.8Affected 5.19Not affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-162.6.1.el9_1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-162.6.1.rt21.168.el9_1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-162.6.1.el9_1 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:5.14.0-70.58.1.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:5.14.0-70.58.1.rt21.129.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat Enterprise Linux 8Red Hat

References

RHSA-2022:7933vendor-advisory
RHSA-2022:8267vendor-advisory
RHSA-2023:3465vendor-advisory
RHSA-2023:3470vendor-advisory
RHSA-2023:3490vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-2008vdb-entry
RHBZ#2186862issue-tracking
https://www.zerodayinitiative.com/advisories/ZDI-23-441/
https://github.com/torvalds/linux/commit/05b252cccb2e5c3f56119d25de684b4f810ba4
https://security.netapp.com/advisory/ntap-20230517-0007/

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