CVE-2020-36149: Incorrect handling of input data in changeAttribute function in the libmysofa library 0.5 - 1.1 will lead to N

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MEDIUM 6.5UPGRADEMITIGATE

CVE-2020-36149 is a medium-severity flaw (CVSS 6.5) affecting libmysofa, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect handling of input data in changeAttribute function in the libmysofa library 0.5 - 1.1 will lead to NULL pointer dereference and segmentation fault error in case of restrictive memory protection or near NULL pointer overwrite in case of no memory restrictions (e.g. in embedded environments).

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-476
Published	2021-02-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fedoraproject · symonics

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-02-08 21:15 UTCPublished CVE record published
2026-06-17 03:14 UTCUpdated Record last modified

symonics libmysofa UPGRADE

Affected: >= 0.5 and <= 1.1

Fixed in: newer than 1.1

Safe to downgrade to: a release before 0.5

1. Check installed version

apt-cache policy libmysofa || rpm -q libmysofa || libmysofa --version

2. UPGRADE to newer than 1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libmysofa

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libmysofa

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.5 (Debian / Ubuntu)

apt-cache madison libmysofa sudo apt install libmysofa=<VERSION_BEFORE_0.5> sudo apt-mark hold libmysofa

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list libmysofa sudo dnf downgrade libmysofa-<VERSION_BEFORE_0.5> sudo dnf versionlock add libmysofa

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

fedoraproject fedora MITIGATE

Affected: 32

Fixed in: no fixed release known

Safe to downgrade to: a release before 32

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-36149?

libmysofa: upgrade to newer than 1.1; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-36149 being exploited?

CVE-2020-36149 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-36149 affect?

CVE-2020-36149 affects libmysofa, fedora. Severity is medium (CVSS 6.5). Incorrect handling of input data in changeAttribute function in the libmysofa library 0.5 - 1.1 will lead to NULL pointer dereference and segmentation fault error in case of restrictive memory protection or near NULL pointer overwrite in ca

How urgent is CVE-2020-36149?

Priority 45/100. Public exploit reference

Related CVEs

CVE-2021-3756 CRITICAL 9.8 UPGRADE MITIGATE libmysofa is vulnerable to Heap-based Buffer Overflow
CVE-2020-36152 HIGH 8.8 UPGRADE MITIGATE Buffer overflow in readDataVar in hdf/dataobject.c in Symonics libmysofa 0.5 - 1.1 allows attackers to execute
CVE-2020-36151 MEDIUM 6.5 UPGRADE MITIGATE Incorrect handling of input data in mysofa_resampler_reset_mem function in the libmysofa library 0.5 - 1.1 wil
CVE-2020-36150 MEDIUM 6.5 UPGRADE MITIGATE Incorrect handling of input data in loudness function in the libmysofa library 0.5 - 1.1 will lead to heap buf
CVE-2020-36148 MEDIUM 6.5 UPGRADE MITIGATE Incorrect handling of input data in verifyAttribute function in the libmysofa library 0.5 - 1.1 will lead to N

References

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