CVE-2021-32606
kernel: isotp_setsockopt in net/can/isotp.c allows privilege escalation via use-after-free
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 12, 2021
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel. A use-after-free flaw in isotp_setsockopt leads to arbitrary kernel execution by overwriting the sk_error_report() pointer which can be misused in order to execute a user-controlled ROP chain to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.8CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE-416 · Use After Free