Linux Kernel up to 5.18.5 ata_host_alloc_pinfo ppi 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 classified as critical has been found in Linux Kernel up to 5.18.5. This affects the function ata_host_alloc_pinfo. This manipulation of the argument ppi causes null pointer dereference. This vulnerability is handled as CVE-2022-49731. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.18.5. Affected by this vulnerability is the function ata_host_alloc_pinfo. The manipulation of the argument ppi 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: ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo() In an unlikely (and probably wrong?) case that the 'ppi' parameter of ata_host_alloc_pinfo() points to an array starting with a NULL pointer, there's going to be a kernel oops as the 'pi' local variable won't get reassigned from the initial value of NULL. Initialize 'pi' instead to '&ata_dummy_port_info' to fix the possible kernel oops for good... Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2022-49731 since 02/26/2025. The exploitation appears to be easy. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 235744 (EulerOS 2.0 SP10 : kernel (EulerOS-SA-2025-1520)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.320, 4.14.285, 4.19.249, 5.4.200, 5.10.124, 5.15.49 or 5.18.6 eliminates this vulnerability. Applying the patch ca4693e6e06e4fd2b240c0fec47aa2498c94848e/1ac5efee33f29e704226506d429b84575a5d66f8/a810bd5af06977a847d1f202b22d7defd5c62497/253334f84c81bc6a43af489f108c0bddad989eef/36cd19e7d4e5571d77a2ed20c5b6ef50cf57734a/ff128fbea720bf763fa345680dda5f050bc24a47/07cbdb4807d369fbda73062a91b570c4dc5ec429/bf476fe22aa1851bab4728e0c49025a6a0bea307 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 (235744). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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: 235744
Nessus Name: EulerOS 2.0 SP10 : kernel (EulerOS-SA-2025-1520)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.9.320/4.14.285/4.19.249/5.4.200/5.10.124/5.15.49/5.18.6
Patch: ca4693e6e06e4fd2b240c0fec47aa2498c94848e/1ac5efee33f29e704226506d429b84575a5d66f8/a810bd5af06977a847d1f202b22d7defd5c62497/253334f84c81bc6a43af489f108c0bddad989eef/36cd19e7d4e5571d77a2ed20c5b6ef50cf57734a/ff128fbea720bf763fa345680dda5f050bc24a47/07cbdb4807d369fbda73062a91b570c4dc5ec429/bf476fe22aa1851bab4728e0c49025a6a0bea307

Timelineinfo

02/26/2025 🔍
02/26/2025 +0 days 🔍
02/26/2025 +0 days 🔍
05/13/2025 +76 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2022-49731 (🔍)
GCVE (CVE): GCVE-0-2022-49731
GCVE (VulDB): GCVE-100-297541

Entryinfo

Created: 02/26/2025 12:10
Updated: 05/13/2025 13:10
Changes: 02/26/2025 12:10 (59), 03/08/2025 09:08 (11), 05/13/2025 13:10 (2)
Complete: 🔍
Cache ID: 216::103

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