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.
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.
Vendor
Product
CWE
Yayın Tarihi
2025-07-10 08:15:30
Güncelleme
2025-12-19 17:58:50
Source Identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
KEV Date Added
-
Kategoriler
Referanslar
https://git.kernel.org/stable/c/2d63433e8eaa3c91b2948190e395bc67009db0d9
https://git.kernel.org/stable/c/3f6dae09fc8c306eb70fdfef70726e1f154e173a
https://git.kernel.org/stable/c/53784073cbad18f75583fd3da9ffdfc4d1f05405
https://git.kernel.org/stable/c/54947530663edcbaaee1314c01fdd8c72861b124
https://git.kernel.org/stable/c/610f247f2772e4f92b63442125a1b7ade79898d8
https://git.kernel.org/stable/c/9027ce4c037b566b658b8939a76326b7125e3627
https://git.kernel.org/stable/c/ab91647acdf43b984824776559a452212eaeb21a
https://git.kernel.org/stable/c/b235393b9f43ff86a38ca2bde6372312ea215dc5
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html