Linux Kernel up to 6.0.8 phy PCS_USB 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 labeled as critical has been found in Linux Kernel up to 6.0.8. This affects the function PCS_USB of the component phy. Such manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2022-49848. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.0.8. Affected by this issue is the function PCS_USB of the component phy. 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: phy: qcom-qmp-combo: fix NULL-deref on runtime resume Commit fc64623637da ("phy: qcom-qmp-combo,usb: add support for separate PCS_USB region") started treating the PCS_USB registers as potentially separate from the PCS registers but used the wrong base when no PCS_USB offset has been provided. Fix the PCS_USB base used at runtime resume to prevent dereferencing a NULL pointer on platforms that do not provide a PCS_USB offset (e.g. SC7180).

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2022-49848 since 05/01/2025. Technical details are known, but there is no available exploit.

Upgrading to version 6.0.9 eliminates this vulnerability. Applying the patch c559a8b5cfa3db196ced0257b288f17027621348/04948e757148f870a31f4887ea2239403f516c3c 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.

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Productinfo

Type

Vendor

Name

Version

License

Website

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

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: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.0.9
Patch: c559a8b5cfa3db196ced0257b288f17027621348/04948e757148f870a31f4887ea2239403f516c3c

Timelineinfo

05/01/2025 🔍
05/01/2025 +0 days 🔍
05/01/2025 +0 days 🔍
05/01/2025 +0 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-49848 (🔍)
GCVE (CVE): GCVE-0-2022-49848
GCVE (VulDB): GCVE-100-306974

Entryinfo

Created: 05/01/2025 17:32
Changes: 05/01/2025 17:32 (59)
Complete: 🔍
Cache ID: 216::103

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