Medium severity · published Dec 15, 2021
CVE-2021-0920
Android Kernel Race Condition Vulnerability
In wildKEV
6.4
CVSS
0.9%
EPSS
Yes
On KEV
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
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildYes
CISA KEVListed May 23, 2022
Federal remediation dueJun 13, 2022
Ransomware campaign useNot known
Affected products
Which versions
AN
Android · Google
Android kernel · source: vendor, NVD
KE
Kernel · Linux
through 5.13; 5.14; 5.14; 5.14 · source: NVD, KEV
DL
Debian Linux · Debian
9.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-0920
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-0920
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://source.android.com/security/bulletin/2021-11-01
mailing-list
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
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