CVE-2025-38312

Severity CVSS v4.0:

Pending analysis

Type:

CWE-369 Divide By Zero

Publication date:

10/07/2025

Last modified:

19/12/2025

Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod() In fb_find_mode_cvt(), iff mode->refresh somehow happens to be 0x80000000, cvt.f_refresh will become 0 when multiplying it by 2 due to overflow. It&#39;s then passed to fb_cvt_hperiod(), where it&#39;s used as a divider -- division by 0 will result in kernel oops. Add a sanity check for cvt.f_refresh to avoid such overflow... Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool.

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::::::::	2.6.14 (including)	5.4.295 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.239 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.186 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.142 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.94 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.34 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.15.3 (excluding)
cpe:2.3:o:debian:debian_linux:11.0:::::::*

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

CVE-2025-38312

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools