Answer in brief
CVE-2025-21762 records a Unknown severity vulnerability in arp: use RCU protection in arp_xmit(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - BIOS (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). 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-2025-21762 records a Unknown severity vulnerability in arp: use RCU protection in arp_xmit(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - BIOS (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). 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 TM MFP - BIOS (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=29a26a56803855a79dbd028cd61abee56237d6e5 <10f555e3f573d004ae9d89b3276abb58c4ede5c3 || >=29a26a56803855a79dbd028cd61abee56237d6e5 <307cd1e2d3cb1cbc6c40c679cada6d7168b18431 || >=29a26a56803855a79dbd028cd61abee56237d6e5 <d9366ac2f956a1948b68c0500f84a3462ff2ed8a || >=29a26a56803855a79dbd028cd61abee56237d6e5 <f189654459423d4d48bef2d120b4bfba559e6039 || >=29a26a56803855a79dbd028cd61abee56237d6e5 <e9f4dee534eb1b225b0a120395ad9bc2afe164d3 || >=29a26a56803855a79dbd028cd61abee56237d6e5 <01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe || >=29a26a56803855a79dbd028cd61abee56237d6e5 <2c331718d3389b6c5f6855078ab7171849e016bd || >=29a26a56803855a79dbd028cd61abee56237d6e5 <a42b69f692165ec39db42d595f4f65a4c8f42e44 | 10f555e3f573d004ae9d89b3276abb58c4ede5c3, 307cd1e2d3cb1cbc6c40c679cada6d7168b18431, d9366ac2f956a1948b68c0500f84a3462ff2ed8a, f189654459423d4d48bef2d120b4bfba559e6039, e9f4dee534eb1b225b0a120395ad9bc2afe164d3, 01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe, 2c331718d3389b6c5f6855078ab7171849e016bd, a42b69f692165ec39db42d595f4f65a4c8f42e44 |
| Linux/Linuxgeneric | 4.4 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - BIOSgeneric | >=0 <* | * |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Feb 27, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: arp: use RCU protection in arp_xmit() arp_xmit() can be called without RTNL or RCU protection. Use RCU protection to avoid potential UAF.
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 TM MFP - BIOS (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=29a26a56803855a79dbd028cd61abee56237d6e5 <10f555e3f573d004ae9d89b3276abb58c4ede5c3 || >=29a26a56803855a79dbd028cd61abee56237d6e5 <307cd1e2d3cb1cbc6c40c679cada6d7168b18431 || >=29a26a56803855a79dbd028cd61abee56237d6e5 <d9366ac2f956a1948b68c0500f84a3462ff2ed8a || >=29a26a56803855a79dbd028cd61abee56237d6e5 <f189654459423d4d48bef2d120b4bfba559e6039 || >=29a26a56803855a79dbd028cd61abee56237d6e5 <e9f4dee534eb1b225b0a120395ad9bc2afe164d3 || >=29a26a56803855a79dbd028cd61abee56237d6e5 <01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe || >=29a26a56803855a79dbd028cd61abee56237d6e5 <2c331718d3389b6c5f6855078ab7171849e016bd || >=29a26a56803855a79dbd028cd61abee56237d6e5 <a42b69f692165ec39db42d595f4f65a4c8f42e44 | 10f555e3f573d004ae9d89b3276abb58c4ede5c3, 307cd1e2d3cb1cbc6c40c679cada6d7168b18431, d9366ac2f956a1948b68c0500f84a3462ff2ed8a, f189654459423d4d48bef2d120b4bfba559e6039, e9f4dee534eb1b225b0a120395ad9bc2afe164d3, 01d1b5c9abcaff29a43f1d17a19c33eec92c7dbe, 2c331718d3389b6c5f6855078ab7171849e016bd, a42b69f692165ec39db42d595f4f65a4c8f42e44 |
| Linux/Linuxgeneric | 4.4 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - BIOSgeneric | >=0 <* | * |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Feb 27, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: arp: use RCU protection in arp_xmit() arp_xmit() can be called without RTNL or RCU protection. Use RCU protection to avoid potential UAF.
Quoted source text, attributed separately from HOL analysis.