Linux Kernel up to 6.5.4 media az6027_i2c_xfer null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.5.4. Impacted is the function az6027_i2c_xfer of the component media. Such manipulation leads to null pointer dereference. This vulnerability is documented as CVE-2023-54314. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.5.4. Affected by this issue is the function az6027_i2c_xfer of the component media. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: media: af9005: Fix null-ptr-deref in af9005_i2c_xfer In af9005_i2c_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach af9005_i2c_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].len to prevent crash. Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2023-54314 since 12/30/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 319448 (EulerOS Virtualization 2.13.1 : kernel (EulerOS-SA-2026-2132)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.326, 4.19.295, 5.4.257, 5.10.197, 5.15.133, 6.1.55 or 6.5.5 eliminates this vulnerability. Applying the patch 98c12abb275b75a98ff62de9466d21e4daa98536/63d962ac7a52c0ff4cd09af2e284dce5e5955dfe/0c02eb70b1dd4ae9bb304ce6cdadbc6faba2b2e9/c7e5ac737db25d7387fe517cb5207706782b6cf8/033b0c0780adee32dde218179e9bc51d2525108f/abb6fd93e05e80668d2317fe1110bc99b05034c3/e595ff350b2fd600823ee8491df7df693ae4b7c5/f4ee84f27625ce1fdf41e8483fa0561a1b837d10 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 databases at Tenable (319448) and CERT Bund (WID-SEC-2025-2941). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source Linux Kernel

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 319448
Nessus Name: EulerOS Virtualization 2.13.1 : kernel (EulerOS-SA-2026-2132)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.326/4.19.295/5.4.257/5.10.197/5.15.133/6.1.55/6.5.5
Patch: 98c12abb275b75a98ff62de9466d21e4daa98536/63d962ac7a52c0ff4cd09af2e284dce5e5955dfe/0c02eb70b1dd4ae9bb304ce6cdadbc6faba2b2e9/c7e5ac737db25d7387fe517cb5207706782b6cf8/033b0c0780adee32dde218179e9bc51d2525108f/abb6fd93e05e80668d2317fe1110bc99b05034c3/e595ff350b2fd600823ee8491df7df693ae4b7c5/f4ee84f27625ce1fdf41e8483fa0561a1b837d10

Timelineinfo

12/30/2025 Advisory disclosed
12/30/2025 +0 days CVE reserved
12/30/2025 +0 days VulDB entry created
06/07/2026 +159 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-54314 (🔒)
GCVE (CVE): GCVE-0-2023-54314
GCVE (VulDB): GCVE-100-338816
CERT Bund: WID-SEC-2025-2941 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/30/2025 15:42
Updated: 06/07/2026 13:44
Changes: 12/30/2025 15:42 (59), 01/01/2026 22:26 (7), 06/07/2026 13:44 (2)
Complete: 🔍
Cache ID: 216::103

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