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.
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.
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.