Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2022-48636

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
28/04/2024
Last modified:
21/03/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup<br /> <br /> Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup<br /> pointer being NULL.<br /> <br /> The pavgroup pointer is checked on the entrance of the function but<br /> without the lcu-&gt;lock being held. Therefore there is a race window<br /> between dasd_alias_get_start_dev() and _lcu_update() which sets<br /> pavgroup to NULL with the lcu-&gt;lock held.<br /> <br /> Fix by checking the pavgroup pointer with lcu-&gt;lock held.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 2.6.25 (including) 4.9.330 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.10 (including) 4.14.295 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.15 (including) 4.19.260 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.20 (including) 5.4.215 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5 (including) 5.10.146 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.71 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.19.12 (excluding)
cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc6:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools