Answer in brief
CVE-2025-21791 records a Unknown severity vulnerability in vrf: use RCU protection in l3mdev_l3_out(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (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-2025-21791 records a Unknown severity vulnerability in vrf: use RCU protection in l3mdev_l3_out(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <20a3489b396764cc9376e32a9172bee26a89dc3b || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <5bb4228c32261d06e4fbece37ec3828bcc005b6b || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <c7574740be8ce68a57d0aece24987b9be2114c3c || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <c40cb5c03e37552d6eff963187109e2c3f78ef6f || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <022cac1c693add610ae76ede03adf4d9d5a2cf21 || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <7b81425b517accefd46bee854d94954f5c57e019 || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <6d0ce46a93135d96b7fa075a94a88fe0da8e8773 | 6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e, 20a3489b396764cc9376e32a9172bee26a89dc3b, 5bb4228c32261d06e4fbece37ec3828bcc005b6b, c7574740be8ce68a57d0aece24987b9be2114c3c, c40cb5c03e37552d6eff963187109e2c3f78ef6f, 022cac1c693add610ae76ede03adf4d9d5a2cf21, 7b81425b517accefd46bee854d94954f5c57e019, 6d0ce46a93135d96b7fa075a94a88fe0da8e8773 |
| Linux/Linuxgeneric | 4.9 | Not reported |
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: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <20a3489b396764cc9376e32a9172bee26a89dc3b || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <5bb4228c32261d06e4fbece37ec3828bcc005b6b || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <c7574740be8ce68a57d0aece24987b9be2114c3c || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <c40cb5c03e37552d6eff963187109e2c3f78ef6f || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <022cac1c693add610ae76ede03adf4d9d5a2cf21 || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <7b81425b517accefd46bee854d94954f5c57e019 || >=a8e3e1a9f02094145580ea7920c6a1d9aabd5539 <6d0ce46a93135d96b7fa075a94a88fe0da8e8773 | 6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e, 20a3489b396764cc9376e32a9172bee26a89dc3b, 5bb4228c32261d06e4fbece37ec3828bcc005b6b, c7574740be8ce68a57d0aece24987b9be2114c3c, c40cb5c03e37552d6eff963187109e2c3f78ef6f, 022cac1c693add610ae76ede03adf4d9d5a2cf21, 7b81425b517accefd46bee854d94954f5c57e019, 6d0ce46a93135d96b7fa075a94a88fe0da8e8773 |
| Linux/Linuxgeneric | 4.9 | Not reported |
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: vrf: use RCU protection in l3mdev_l3_out() l3mdev_l3_out() can be called without RCU being held: raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out() Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.
Quoted source text, attributed separately from HOL analysis.