What is CVE-2021-0920?

CVE-2021-0920 is a vulnerability in Android. Published 2021-12-15.

Is CVE-2021-0920 known to be exploited?

Yes. CVE-2021-0920 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23), indicating it is being actively exploited. 18 public proof-of-concept repositories are indexed.

Vulnerability in Android

CVE-2021-0920

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.Prod…

EPSS: 0.009 (76.5th percentile) — read the EPSS interpretation.

Affected products

N/a Android — versions Android kernel

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-05-23. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-06-13.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

source.android.com/security/bulletin/2021-11-01 (x_refsource_MISC)
[debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update (mailing-list, x_refsource_MLIST)

Frequently asked questions

What is CVE-2021-0920?: CVE-2021-0920 is a vulnerability in Android. Published 2021-12-15.
Is CVE-2021-0920 known to be exploited?: Yes. CVE-2021-0920 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23), indicating it is being actively exploited. 18 public proof-of-concept repositories are indexed.