CVE-2021-47670
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: fix use after free bugs After calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: fix use after free bugs After calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the peak_usb_netif_rx_ni(). Reordering the lines solves the issue.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.21% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71Patch
- https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbePatch
- https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2Patch
- https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.