CVE-2025-38312

MEDIUM EPSS 4.5%
Published Jul 10, 202511mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 10, 2025 11mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-369

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥2.6.14  –  <5.4.295
linuxlinux_kernel*≥5.5  –  <5.10.239
linuxlinux_kernel*≥5.11  –  <5.15.186
linuxlinux_kernel*≥5.16  –  <6.1.142
linuxlinux_kernel*≥6.2  –  <6.6.94
linuxlinux_kernel*≥6.7  –  <6.12.34
linuxlinux_kernel*≥6.13  –  <6.15.3
debiandebian_linux11.0any

References 11

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-082556.html
  • git.kernel.org https://git.kernel.org/stable/c/2d63433e8eaa3c91b2948190e395bc67009db0d9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3f6dae09fc8c306eb70fdfef70726e1f154e173a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/53784073cbad18f75583fd3da9ffdfc4d1f05405
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54947530663edcbaaee1314c01fdd8c72861b124
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/610f247f2772e4f92b63442125a1b7ade79898d8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9027ce4c037b566b658b8939a76326b7125e3627
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ab91647acdf43b984824776559a452212eaeb21a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b235393b9f43ff86a38ca2bde6372312ea215dc5
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2d63433e8eaa3c91b2948190e395bc67009db0d9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3f6dae09fc8c306eb70fdfef70726e1f154e173a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/53784073cbad18f75583fd3da9ffdfc4d1f05405
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54947530663edcbaaee1314c01fdd8c72861b124
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/610f247f2772e4f92b63442125a1b7ade79898d8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9027ce4c037b566b658b8939a76326b7125e3627
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ab91647acdf43b984824776559a452212eaeb21a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b235393b9f43ff86a38ca2bde6372312ea215dc5
    Patch