CVE-2021-0561

Name: CVE-2021-0561
Creator: NVD / NIST
Published: 2021-06-22T11:15:08.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2021-0561 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In append_to_verify_fifo_interleaved_ of stream_encoder.c, there is a possible out of bounds write due to a missing bounds check. This could lead to local information disclosure with no additional execution privileges needed. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

Description

In append_to_verify_fifo_interleaved_ of stream_encoder.c, there is a possible out of bounds write due to a missing bounds check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-174302683

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.46%

36.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Google	Android	11.0
Fedoraproject	Fedora	35
Fedoraproject	Fedora	36
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://lists.debian.org/debian-lts-announce/2022/03/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00003.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWXBVMPPSL377I7YM55ZYXVKVMYOKES2/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q4Y7BW35TGNFYBYBSBDSGLUJHHTYEUSG/
https://source.android.com/security/bulletin/pixel/2021-06-01Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00003.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWXBVMPPSL377I7YM55ZYXVKVMYOKES2/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q4Y7BW35TGNFYBYBSBDSGLUJHHTYEUSG/
https://source.android.com/security/bulletin/pixel/2021-06-01Patch, Vendor Advisory

Timeline

Published: Jun 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-0561?

How severe is CVE-2021-0561?

CVE-2021-0561 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-0561?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-0561?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST