CVE-2021-47520
Last modified
CVE-2021-47520 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.37, < 4.4.295 |
| Linux | Linux Kernel | >= 4.5, < 4.9.293 |
| Linux | Linux Kernel | >= 4.10, < 4.14.258 |
| Linux | Linux Kernel | >= 4.15, < 4.19.221 |
| Linux | Linux Kernel | >= 4.20, < 5.4.165 |
| Linux | Linux Kernel | >= 5.5, < 5.10.85 |
| Linux | Linux Kernel | >= 5.11, < 5.15.8 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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