CVE-2025-38312

MEDIUM

MEDIUM Priority: 0.01 BB Relevance: 36/100

Published: 2025-07-10 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: None

I: None

A: High

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's then passed to fb_cvt_hperiod(), where it'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.

Weakness Classification (1)

CWE-369

Affected Software (11)

Vendor	Product	Version
Linux	Linux	96fe6a2109db29cd15b90a093c16e6cb4b19371a < 9027ce4c037b566b658b8939a76326b7125e3627
Linux	Linux	96fe6a2109db29cd15b90a093c16e6cb4b19371a < 610f247f2772e4f92b63442125a1b7ade79898d8
Linux	Linux	96fe6a2109db29cd15b90a093c16e6cb4b19371a < 2d63433e8eaa3c91b2948190e395bc67009db0d9
Linux	Linux	96fe6a2109db29cd15b90a093c16e6cb4b19371a < 54947530663edcbaaee1314c01fdd8c72861b124
Linux	Linux	96fe6a2109db29cd15b90a093c16e6cb4b19371a < ab91647acdf43b984824776559a452212eaeb21a
Linux	Linux	96fe6a2109db29cd15b90a093c16e6cb4b19371a < b235393b9f43ff86a38ca2bde6372312ea215dc5
Linux	Linux	96fe6a2109db29cd15b90a093c16e6cb4b19371a < 53784073cbad18f75583fd3da9ffdfc4d1f05405
Linux	Linux	96fe6a2109db29cd15b90a093c16e6cb4b19371a < 3f6dae09fc8c306eb70fdfef70726e1f154e173a
Linux	Linux	2.6.14
debian	debian_linux	11.0
linux	linux_kernel	2.6.14 – 5.4.295