CVE-2025-38312
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedJul 10, 2025
First seenJul 10, 2025
Weakness typeCWE-369CWE-369
How to fix
Update
- linux linux_kernel5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3 or later
Patches
- git.kernel.org/stable/c/2d63433e8eaa3c91b2948190e395bc67009db0d9
- git.kernel.org/stable/c/3f6dae09fc8c306eb70fdfef70726e1f154e173a
- git.kernel.org/stable/c/53784073cbad18f75583fd3da9ffdfc4d1f05405
- git.kernel.org/stable/c/54947530663edcbaaee1314c01fdd8c72861b124
- git.kernel.org/stable/c/610f247f2772e4f92b63442125a1b7ade79898d8
- git.kernel.org/stable/c/9027ce4c037b566b658b8939a76326b7125e3627
- git.kernel.org/stable/c/ab91647acdf43b984824776559a452212eaeb21a
- git.kernel.org/stable/c/b235393b9f43ff86a38ca2bde6372312ea215dc5
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.14 ≤ v < 5.4.295, 5.5 ≤ v < 5.10.239, 5.11 ≤ v < 5.15.186, 5.16 ≤ v < 6.1.142, 6.2 ≤ v < 6.6.94, 6.7 ≤ v < 6.12.34, 6.13 ≤ v < 6.15.3 | 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3 |
| debian debian_linux | 11.0 | — |
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