Vulnerability Monitor

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CVE-2025-38312

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.

Published

2025-07-10T08:15:30.120

Last Modified

2025-12-19T17:58:50.473

Status

Analyzed

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Severity

CVSSv3.1: 5.5 (MEDIUM)

Weaknesses
  • Type: Primary
    CWE-369
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System linux linux_kernel < 5.4.295 Yes
Operating System linux linux_kernel < 5.10.239 Yes
Operating System linux linux_kernel < 5.15.186 Yes
Operating System linux linux_kernel < 6.1.142 Yes
Operating System linux linux_kernel < 6.6.94 Yes
Operating System linux linux_kernel < 6.12.34 Yes
Operating System linux linux_kernel < 6.15.3 Yes
Operating System debian debian_linux 11.0 Yes
References