Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the netif_rx_ni() in: stats->rx_bytes += cf->len; Reordering the lines solves the issue.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.31, < 4.4.254 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/03f16c5075b22c8902d2af739969e878b0879c94Patch
- https://git.kernel.org/stable/c/08ab951787098ae0b6c0364aeea7a8138226f234Patch
- https://git.kernel.org/stable/c/260925a0b7d2da5449f8ecfd02c1405e0c8a45b8Patch
- https://git.kernel.org/stable/c/593c072b7b3c4d7044416eb039d9ad706bedd67aPatch
- https://git.kernel.org/stable/c/92668d28c7e6a7a2ba07df287669ffcdf650c421Patch
- https://git.kernel.org/stable/c/ac48ef15826e83f4206c47add61072e8fc76d328Patch
- https://git.kernel.org/stable/c/bbc6847b9b8978b520f62fbc7c68c54ef0f8d282Patch
FAQ
What is CVE-2021-47668?
CVE-2021-47668 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_fra...
How severe is CVE-2021-47668?
CVE-2021-47668 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47668?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.