Answer in brief
CVE-2025-38312 records a Unknown severity vulnerability in fbdev: core: fbcvt: avoid division by 0 in fb_cvt_hperiod(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=96fe6a2109db29cd15b90a093c16e6cb4b19371a <9027ce4c037b566b658b8939a76326b7125e3627 || >=96fe6a2109db29cd15b90a093c16e6cb4b19371a <610f247f2772e4f92b63442125a1b7ade79898d8 || >=96fe6a2109db29cd15b90a093c16e6cb4b19371a <2d63433e8eaa3c91b2948190e395bc67009db0d9 || >=96fe6a2109db29cd15b90a093c16e6cb4b19371a <54947530663edcbaaee1314c01fdd8c72861b124 || >=96fe6a2109db29cd15b90a093c16e6cb4b19371a <ab91647acdf43b984824776559a452212eaeb21a || >=96fe6a2109db29cd15b90a093c16e6cb4b19371a <b235393b9f43ff86a38ca2bde6372312ea215dc5 || >=96fe6a2109db29cd15b90a093c16e6cb4b19371a <53784073cbad18f75583fd3da9ffdfc4d1f05405 || >=96fe6a2109db29cd15b90a093c16e6cb4b19371a <3f6dae09fc8c306eb70fdfef70726e1f154e173a | 9027ce4c037b566b658b8939a76326b7125e3627, 610f247f2772e4f92b63442125a1b7ade79898d8, 2d63433e8eaa3c91b2948190e395bc67009db0d9, 54947530663edcbaaee1314c01fdd8c72861b124, ab91647acdf43b984824776559a452212eaeb21a, b235393b9f43ff86a38ca2bde6372312ea215dc5, 53784073cbad18f75583fd3da9ffdfc4d1f05405, 3f6dae09fc8c306eb70fdfef70726e1f154e173a |
| Linux/Linuxgeneric | 2.6.14 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jul 10, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.