CVE-2021-0920
MEDIUM KEVLinux Kernel < 5.13 - Use-After-Free via Race Condition in unix_scm_to_skb
Title source: llmExploitation Summary
CVE-2021-0920 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added May 23, 2022.
Description
In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel
References (3)
Core 3
Core References
Vendor Advisory x_refsource_misc
https://source.android.com/security/bulletin/2021-11-01
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
Third Party Advisory, US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-0920
Scores
CVSS v3
6.4
EPSS
0.0091
EPSS Percentile
76.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
active
Automatable
no
Technical Impact
total
Details
CISA KEV
2022-05-23
VulnCheck KEV
2021-11-05
InTheWild.io
2021-11-05
ENISA EUVD
EUVD-2021-3539
CWE
CWE-362
CWE-416
Status
published
Products (4)
debian/debian_linux
9.0
google/android
linux/linux_kernel
5.14 rc1 (3 CPE variants)
linux/linux_kernel
< 5.13
Published
Dec 15, 2021
KEV Added
May 23, 2022
Tracked Since
Feb 18, 2026