Answer in brief
CVE-2025-21761 records a Unknown severity vulnerability in openvswitch: use RCU protection in ovs_vport_cmd_fill_info(). 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 - 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-2025-21761 records a Unknown severity vulnerability in openvswitch: use RCU protection in ovs_vport_cmd_fill_info(). 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 - 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 - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9354d452034273a50a4fd703bea31e5d6b1fc20b <e85a25d1a9985645e796039e843d1de581d2de1e || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <a8816b3f1f151373fd30f1996f00480126c8bb11 || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <a884f57600e463f69d7b279c4598b865260b62a1 || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <7e01abc34e87abd091e619161a20f54ed4e3e2da || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <8ec57509c36c8b9a23e50b7858dda0c520a2d074 || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <a849a10de5e04d798f7f286a2f1ca174719a617a || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <5828937742af74666192835d657095d95c53dbd0 || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <90b2f49a502fa71090d9f4fe29a2f51fe5dff76d | e85a25d1a9985645e796039e843d1de581d2de1e, a8816b3f1f151373fd30f1996f00480126c8bb11, a884f57600e463f69d7b279c4598b865260b62a1, 7e01abc34e87abd091e619161a20f54ed4e3e2da, 8ec57509c36c8b9a23e50b7858dda0c520a2d074, a849a10de5e04d798f7f286a2f1ca174719a617a, 5828937742af74666192835d657095d95c53dbd0, 90b2f49a502fa71090d9f4fe29a2f51fe5dff76d |
| Linux/Linuxgeneric | 4.15 | Not reported |
| 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: openvswitch: use RCU protection in ovs_vport_cmd_fill_info() ovs_vport_cmd_fill_info() can be called without RTNL or RCU. Use RCU protection and dev_net_rcu() 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 - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9354d452034273a50a4fd703bea31e5d6b1fc20b <e85a25d1a9985645e796039e843d1de581d2de1e || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <a8816b3f1f151373fd30f1996f00480126c8bb11 || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <a884f57600e463f69d7b279c4598b865260b62a1 || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <7e01abc34e87abd091e619161a20f54ed4e3e2da || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <8ec57509c36c8b9a23e50b7858dda0c520a2d074 || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <a849a10de5e04d798f7f286a2f1ca174719a617a || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <5828937742af74666192835d657095d95c53dbd0 || >=9354d452034273a50a4fd703bea31e5d6b1fc20b <90b2f49a502fa71090d9f4fe29a2f51fe5dff76d | e85a25d1a9985645e796039e843d1de581d2de1e, a8816b3f1f151373fd30f1996f00480126c8bb11, a884f57600e463f69d7b279c4598b865260b62a1, 7e01abc34e87abd091e619161a20f54ed4e3e2da, 8ec57509c36c8b9a23e50b7858dda0c520a2d074, a849a10de5e04d798f7f286a2f1ca174719a617a, 5828937742af74666192835d657095d95c53dbd0, 90b2f49a502fa71090d9f4fe29a2f51fe5dff76d |
| Linux/Linuxgeneric | 4.15 | Not reported |
| 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: openvswitch: use RCU protection in ovs_vport_cmd_fill_info() ovs_vport_cmd_fill_info() can be called without RTNL or RCU. Use RCU protection and dev_net_rcu() to avoid potential UAF.
Quoted source text, attributed separately from HOL analysis.