Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-49710

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
26/02/2025
Last modified:
24/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> dm mirror log: round up region bitmap size to BITS_PER_LONG<br /> <br /> The code in dm-log rounds up bitset_size to 32 bits. It then uses<br /> find_next_zero_bit_le on the allocated region. find_next_zero_bit_le<br /> accesses the bitmap using unsigned long pointers. So, on 64-bit<br /> architectures, it may access 4 bytes beyond the allocated size.<br /> <br /> Fix this bug by rounding up bitset_size to BITS_PER_LONG.<br /> <br /> This bug was found by running the lvm2 testsuite with kasan.

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:*:*:*:*:*:*:*:* 2.6.18 (including) 5.4.200 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5 (including) 5.10.124 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.49 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.18.6 (excluding)
cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools