CVE-2020-27830

MEDIUM

Linux Kernel < 5.9.14 - NULL Pointer Dereference in spk_ttyio_receive_buf2

Title source: llm
STIX 2.1

Description

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.

References (6)

Core 6
Core References
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2020/12/08/1
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2020/12/08/4
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2021/dsa-4843
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1919900
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210625-0004/

Scores

CVSS v3 5.5
EPSS 0.0030
EPSS Percentile 21.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (3)
debian/debian_linux 9.0
debian/debian_linux 10.0
linux/linux_kernel < 5.9.14
Published May 13, 2021
Tracked Since Feb 18, 2026