Answer in brief
CVE-2021-47669 records a Unknown severity vulnerability in can: vxcan: vxcan_xmit: fix use after free bug. 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 | >=a8f820a380a2a06fc4fe1a54159067958f800929 <6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 || >=a8f820a380a2a06fc4fe1a54159067958f800929 <9b820875a32a3443d67bfd368e93038354e98052 || >=a8f820a380a2a06fc4fe1a54159067958f800929 <a24476b37167816e6352ca1a2cf3769847774f70 || >=a8f820a380a2a06fc4fe1a54159067958f800929 <e771a874076115df8bff27d325edfd2340e4ec69 || >=a8f820a380a2a06fc4fe1a54159067958f800929 <75854cad5d80976f6ea0f0431f8cedd3bcc475cb | 6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105, 9b820875a32a3443d67bfd368e93038354e98052, a24476b37167816e6352ca1a2cf3769847774f70, e771a874076115df8bff27d325edfd2340e4ec69, 75854cad5d80976f6ea0f0431f8cedd3bcc475cb |
| Linux/Linuxgeneric | 4.12 | Not reported |
Published upstream
Apr 17, 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: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-47669 records a Unknown severity vulnerability in can: vxcan: vxcan_xmit: fix use after free bug. 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 | >=a8f820a380a2a06fc4fe1a54159067958f800929 <6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 || >=a8f820a380a2a06fc4fe1a54159067958f800929 <9b820875a32a3443d67bfd368e93038354e98052 || >=a8f820a380a2a06fc4fe1a54159067958f800929 <a24476b37167816e6352ca1a2cf3769847774f70 || >=a8f820a380a2a06fc4fe1a54159067958f800929 <e771a874076115df8bff27d325edfd2340e4ec69 || >=a8f820a380a2a06fc4fe1a54159067958f800929 <75854cad5d80976f6ea0f0431f8cedd3bcc475cb | 6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105, 9b820875a32a3443d67bfd368e93038354e98052, a24476b37167816e6352ca1a2cf3769847774f70, e771a874076115df8bff27d325edfd2340e4ec69, 75854cad5d80976f6ea0f0431f8cedd3bcc475cb |
| Linux/Linuxgeneric | 4.12 | Not reported |
Published upstream
Apr 17, 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: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().
Quoted source text, attributed separately from HOL analysis.