CVE-2021-32606

medium

Published — · Modified —

CVSS v3

—

CVSS v2

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VIR risk

5.5

Description

In the Linux kernel 5.11 through 5.12.2, isotp_setsockopt in net/can/isotp.c allows privilege escalation to root by leveraging a use-after-free. (This does not affect earlier versions that lack CAN ISOTP SF_BROADCAST support.)

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-32606

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-32606.html

OS impact

OS	Version	Status	Fixed in
arch		fixed	`5.12.9.hardened1-1`
sles		affected
debian	bookworm	fixed	`0`
debian	bullseye	fixed	`0`
debian	forky	fixed	`0`
debian	sid	fixed	`0`
debian	trixie	fixed	`0`

References

https://www.suse.com/security/cve/CVE-2021-32606.html
https://security-tracker.debian.org/tracker/CVE-2021-32606

Verify integrity in audit chain (admin only). AS-IS.