Answer in brief
CVE-2026-31431 records a High severity (CVSS 7.8) vulnerability in crypto: algif_aead - Revert to operating out-of-place. The current sources 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 1518-4 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-2026-31431 records a High severity (CVSS 7.8) vulnerability in crypto: algif_aead - Revert to operating out-of-place. The current sources 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 1518-4 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.
CVSS is 7.8. Known-exploitation status makes exposure review time-sensitive. 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 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <893d22e0135fa394db81df88697fba6032747667 || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <19d43105a97be0810edbda875f2cd03f30dc130c || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <961cfa271a918ad4ae452420e7c303149002875b || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <3115af9644c342b356f3f07a4dd1c8905cd9a6fc || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <8b88d99341f139e23bdeb1027a2a3ae10d341d82 || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8 || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <ce42ee423e58dffa5ec03524054c9d8bfd4f6237 || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 | 893d22e0135fa394db81df88697fba6032747667, 19d43105a97be0810edbda875f2cd03f30dc130c, 961cfa271a918ad4ae452420e7c303149002875b, 3115af9644c342b356f3f07a4dd1c8905cd9a6fc, 8b88d99341f139e23bdeb1027a2a3ae10d341d82, fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8, ce42ee423e58dffa5ec03524054c9d8bfd4f6237, a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 |
| Linux/Linuxgeneric | 4.14 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Apr 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
May 1, 2026
Evidence: source:kev:kev:kev:recordIn the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. Known-exploitation status makes exposure review time-sensitive. 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 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <893d22e0135fa394db81df88697fba6032747667 || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <19d43105a97be0810edbda875f2cd03f30dc130c || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <961cfa271a918ad4ae452420e7c303149002875b || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <3115af9644c342b356f3f07a4dd1c8905cd9a6fc || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <8b88d99341f139e23bdeb1027a2a3ae10d341d82 || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8 || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <ce42ee423e58dffa5ec03524054c9d8bfd4f6237 || >=72548b093ee38a6d4f2a19e6ef1948ae05c181f7 <a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 | 893d22e0135fa394db81df88697fba6032747667, 19d43105a97be0810edbda875f2cd03f30dc130c, 961cfa271a918ad4ae452420e7c303149002875b, 3115af9644c342b356f3f07a4dd1c8905cd9a6fc, 8b88d99341f139e23bdeb1027a2a3ae10d341d82, fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8, ce42ee423e58dffa5ec03524054c9d8bfd4f6237, a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 |
| Linux/Linuxgeneric | 4.14 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Apr 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
May 1, 2026
Evidence: source:kev:kev:kev:recordIn the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.
Quoted source text, attributed separately from HOL analysis.