CVE-2021-47668
Last modified
CVE-2021-47668 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 2.6.31, < 4.4.254 | — |
| Linux | Linux Kernel | >= 4.5, < 4.9.254 | — |
| Linux | Linux Kernel | >= 4.10, < 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 | Rc1 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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