Linux Kernel up to 5.17.1 cavium-rng-vf.c 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 described as critical has been identified in Linux Kernel up to 5.17.1. Affected by this vulnerability is an unknown functionality of the file /drivers/char/hw_random/cavium-rng-vf.c. Executing a manipulation can lead to null pointer dereference. The identification of this vulnerability is CVE-2022-49177. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.17.1. It has been declared as critical. This vulnerability affects an unknown code block of the file /drivers/char/hw_random/cavium-rng-vf.c. 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. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: hwrng: cavium - fix NULL but dereferenced coccicheck error Fix following coccicheck warning: ./drivers/char/hw_random/cavium-rng-vf.c:182:17-20: ERROR: pdev is NULL but dereferenced.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-49177 since 02/26/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 238183 (EulerOS 2.0 SP12 : kernel (EulerOS-SA-2025-1590)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.17.2 eliminates this vulnerability. Applying the patch e47b12f9415169eceda6770fcf45802e0c8d2a66/e6205ad58a7ac194abfb33897585b38687d797fa 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 (238183). Once again VulDB remains the best source 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

AVACAuCIA
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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: 238183
Nessus Name: EulerOS 2.0 SP12 : kernel (EulerOS-SA-2025-1590)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.17.2
Patch: e47b12f9415169eceda6770fcf45802e0c8d2a66/e6205ad58a7ac194abfb33897585b38687d797fa

Timelineinfo

02/26/2025 🔍
02/26/2025 +0 days 🔍
02/26/2025 +0 days 🔍
06/13/2025 +107 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-49177 (🔍)
GCVE (CVE): GCVE-0-2022-49177
GCVE (VulDB): GCVE-100-297484

Entryinfo

Created: 02/26/2025 11:53
Updated: 06/13/2025 08:49
Changes: 02/26/2025 11:53 (58), 03/18/2025 05:58 (11), 06/13/2025 08:49 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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