CVEvulnerability
CVE-2021-47669
7.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2025-04-17
- Last modified
- 2026-06-17
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416
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().
Affected configurations
• linux linux kernel (>= 4.12 < 4.14.218)
• linux linux kernel (>= 4.15 < 4.19.171)
• linux linux kernel (>= 4.20 < 5.4.93)
• linux linux kernel (>= 5.5 < 5.10.11)
• linux linux kernel 5.11
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 Patch
- https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb Patch
- https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 Patch
- https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 Patch
- https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69 Patch