CVE-2021-32606

HIGH

Linux Kernel 5.11-5.12.2 - Use-After-Free in CAN ISOTP Setsockopt

Title source: llm

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.)

References (10)

Core 10

Core References

Mailing List, Third Party Advisory mailing-list

http://www.openwall.com/lists/oss-security/2021/05/12/1

Mailing List, Third Party Advisory mailing-list

http://www.openwall.com/lists/oss-security/2021/05/13/2

Mailing List, Third Party Advisory mailing-list

http://www.openwall.com/lists/oss-security/2021/05/14/1

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HD3NJBG25AADVGPRC63RX2JOQBMPSWK4/

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GI7Z7UBWBGD3ABNIL2DC7RQDCGA4UVQW/

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/73D53S4IZFPFQMRABMXXLW4AJK3EULDX/

Mailing List, Patch, Third Party Advisory mailing-list

http://www.openwall.com/lists/oss-security/2021/05/28/1

Third Party Advisory

https://security.netapp.com/advisory/ntap-20210625-0001/

Mailing List, Third Party Advisory

https://www.openwall.com/lists/oss-security/2021/05/11/16

Patch

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2b17c400aeb44daf041627722581ade527bb3c1d

Scores

CVSS v3 7.8

EPSS 0.0042

EPSS Percentile 33.6%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE

CWE-416

Status published

Products (4)

fedoraproject/fedora 32

fedoraproject/fedora 33

fedoraproject/fedora 34

linux/linux_kernel 5.11 - 5.12.9

Published May 11, 2021

Tracked Since Feb 18, 2026