VDB-327449 · CVE-2023-53646 · WID-SEC-2025-2229

Linux Kernel up to 6.4.6 xehp_oa_b_counters out-of-bounds

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4.8	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.4.6 and classified as critical. Affected by this issue is the function xehp_oa_b_counters. The manipulation leads to out-of-bounds. This vulnerability is traded as CVE-2023-53646. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.4.6. This issue affects the function xehp_oa_b_counters. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/i915/perf: add sentinel to xehp_oa_b_counters Arrays passed to reg_in_range_table should end with empty record. The patch solves KASAN detected bug with signature: BUG: KASAN: global-out-of-bounds in xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915] Read of size 4 at addr ffffffffa1555d90 by task perf/1518 CPU: 4 PID: 1518 Comm: perf Tainted: G U 6.4.0-kasan_438-g3303d06107f3+ #1 Hardware name: Intel Corporation Meteor Lake Client Platform/MTL-P DDR5 SODIMM SBS RVP, BIOS MTLPFWI1.R00.3223.D80.2305311348 05/31/2023 Call Trace: <TASK> ... xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915] (cherry picked from commit 2f42c5afb34b5696cf5fe79e744f99be9b218798)

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2023-53646 since 10/07/2025. The exploitation is known to be difficult. Technical details are known, but no exploit is available.

Upgrading to version 6.4.7 eliminates this vulnerability. Applying the patch 21d92025e80629fd5c25cd6751f8cf38c784dd4a/785b3f667b4bf98804cad135005e964df0c750de is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2025-2229). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Amazon Linux 2
Red Hat Enterprise Linux
SUSE Linux
Oracle Linux
RESF Rocky Linux
Open Source Linux Kernel
IBM QRadar SIEM
Dell NetWorker

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.8

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.1
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.4.7
Patch: 21d92025e80629fd5c25cd6751f8cf38c784dd4a/785b3f667b4bf98804cad135005e964df0c750de

Timelineinfo

10/07/2025 Advisory disclosed
10/07/2025 +0 days CVE reserved
10/07/2025 +0 days VulDB entry created
03/01/2026 +145 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53646 (🔒)
GCVE (CVE): GCVE-0-2023-53646
GCVE (VulDB): GCVE-100-327449
CERT Bund: WID-SEC-2025-2229 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/07/2025 19:17
Updated: 03/01/2026 11:50
Changes: 10/07/2025 19:17 (58), 11/23/2025 02:25 (7), 12/24/2025 13:08 (1), 02/04/2026 00:15 (12), 03/01/2026 11:50 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.