CVE-2025-38312fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod()
Updated under an hour ago ()
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It affects Linux and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Not yet received
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 96fe6a2109db29cd15b90a093c16e6cb4b19371a before 9027ce4c037b566b658b8939a76326b7125e3627; from 96fe6a2109db29cd15b90a093c16e6cb4b19371a before 610f247f2772e4f92b63442125a1b7ade79898d8; 96fe6a2109db29cd15b90a093c16e6cb4b19371a builds before 2d63433e8eaa3c91b2948190e395bc67009db0d9; from 96fe6a2109db29cd15b90a093c16e6cb4b19371a before 54947530663edcbaaee1314c01fdd8c72861b124; from 96fe6a2109db29cd15b90a093c16e6cb4b19371a before ab91647acdf43b984824776559a452212eaeb21a; from 96fe6a2109db29cd15b90a093c16e6cb4b19371a before b235393b9f43ff86a38ca2bde6372312ea215dc5; from 96fe6a2109db29cd15b90a093c16e6cb4b19371a before 53784073cbad18f75583fd3da9ffdfc4d1f05405; 96fe6a2109db29cd15b90a093c16e6cb4b19371a builds before 3f6dae09fc8c306eb70fdfef70726e1f154e173a | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
References
- https://git.kernel.org/stable/c/9027ce4c037b566b658b8939a76326b7125e3627
- https://git.kernel.org/stable/c/610f247f2772e4f92b63442125a1b7ade79898d8
- https://git.kernel.org/stable/c/2d63433e8eaa3c91b2948190e395bc67009db0d9
- https://git.kernel.org/stable/c/54947530663edcbaaee1314c01fdd8c72861b124
- https://git.kernel.org/stable/c/ab91647acdf43b984824776559a452212eaeb21a
- https://git.kernel.org/stable/c/b235393b9f43ff86a38ca2bde6372312ea215dc5
- https://git.kernel.org/stable/c/53784073cbad18f75583fd3da9ffdfc4d1f05405
- https://git.kernel.org/stable/c/3f6dae09fc8c306eb70fdfef70726e1f154e173a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.