CVE-2021-38204

Description

drivers/usb/host/max3421-hcd.c in the Linux kernel before 5.13.6 allows physically proximate attackers to cause a denial of service (use-after-free and panic) by removing a MAX-3421 USB device in certain situations.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.8CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 4.6AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.07%• Percentile: 20%

Techniques & Countermeasures

• CWE-416•Use After Free

  The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

• debian•debian_linux

  9.0

• linux•linux_kernel

  < 5.13.6

References (3)

• https://github.com/torvalds/linux/commit/b5fdf5c6e6bee35837e160c00ac89327bdad031b
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6
• https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html