Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: pch_can: pch_can_rx_normal: fix use after free After calling netif_receive_skb(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is dereferenced just after the call netif_receive_skb(skb). Reordering the lines solves the issue.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.37, < 4.4.295 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76Patch
- https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aaPatch
- https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7Patch
- https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612ePatch
- https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458dbPatch
- https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4Patch
- https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3Patch
- https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8dPatch
- https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76Patch
- https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aaPatch
- https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7Patch
- https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612ePatch
- https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458dbPatch
- https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4Patch
- https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3Patch
FAQ
What is CVE-2021-47520?
CVE-2021-47520 is a vulnerability with a CVSS score of 8.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: can: pch_can: pch_can_rx_normal: fix use after free After calling netif_receive_skb(skb), dereferencing skb is unsafe. Especially,...
How severe is CVE-2021-47520?
CVE-2021-47520 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47520?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.