CVE-2021-47669 Details
Description
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().
A use-after-free vulnerability has been identified in the Linux kernel's CAN protocol implementation, specifically within the VXCAN component. The issue arises in the 'vxcan_xmit' function, where the 'netif_rx_ni' function is called to receive a socket buffer (skb). This operation creates a race condition, as the 'canfd_frame' (cfd) that references the skb memory is accessed after it has been freed, leading to potential memory corruption.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 17, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 | kernel.org | Patch |
| https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb | kernel.org | Patch |
| https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 | kernel.org | Patch |
| https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.12, < 4.14.218 >= 4.15, < 4.19.171 >= 4.20, < 5.4.93 >= 5.5, < 5.10.11 5.11 rc1 5.11 rc2 5.11 rc3 5.11 rc4 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 21, 2025 | Initial Analysis | [email protected] |
| Apr 17, 2025 | CVE Modified | CISA-ADP |
| Apr 17, 2025 | New CVE Received | kernel.org |