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 was found in Linux Kernel up to 6.5.4. It has been classified as critical. Affected is the function az6027_i2c_xfer of the component Media. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2023-52915. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.5.4. Affected by this vulnerability is the function az6027_i2c_xfer of the component Media. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: media: dvb-usb-v2: af9035: Fix null-ptr-deref in af9035_i2c_master_xfer In af9035_i2c_master_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 af9035_i2c_master_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()")

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2023-52915 since 08/21/2024. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 208672 (SUSE SLES12 Security Update : kernel (SUSE-SU-2024:3566-1)), 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 b2f54ed7739d/fa58d9db5cad/b49c6e5dd236/6c01ef65de0b/d9ef84a7c222/0143f282b15f/41b7181a40af/7bf744f2de0a 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 Tenable (208672). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

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

NVD Base Score: 5.5
NVD Vector: 🔍

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: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 208672
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2024:3566-1)

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: b2f54ed7739d/fa58d9db5cad/b49c6e5dd236/6c01ef65de0b/d9ef84a7c222/0143f282b15f/41b7181a40af/7bf744f2de0a

Timelineinfo

08/21/2024 🔍
09/06/2024 +16 days 🔍
09/06/2024 +0 days 🔍
10/11/2024 +35 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-52915 (🔍)
GCVE (CVE): GCVE-0-2023-52915
GCVE (VulDB): GCVE-100-276715

Entryinfo

Created: 09/06/2024 11:43
Updated: 10/11/2024 13:20
Changes: 09/06/2024 11:43 (59), 09/11/2024 08:01 (11), 10/11/2024 13:20 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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