CVE-2021-37778: There is a buffer overflow in gps-sdr-sim v1.0 when parsing long command line parameters, which can lead to Do

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-37778 is a critical-severity flaw (CVSS 9.8) affecting gps-sdr-sim. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

There is a buffer overflow in gps-sdr-sim v1.0 when parsing long command line parameters, which can lead to DoS or code execution.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-120
Published	2022-06-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gps-sdr-sim project

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

Am I affected?

Timeline

2022-06-30 15:15 UTCPublished CVE record published
2026-06-17 04:01 UTCUpdated Record last modified

gps-sdr-sim project gps-sdr-sim DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy gps-sdr-sim || rpm -q gps-sdr-sim || gps-sdr-sim --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison gps-sdr-sim sudo apt install gps-sdr-sim=<VERSION_BEFORE_1.0> sudo apt-mark hold gps-sdr-sim

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list gps-sdr-sim sudo dnf downgrade gps-sdr-sim-<VERSION_BEFORE_1.0> sudo dnf versionlock add gps-sdr-sim

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.

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-2021-37778?

gps-sdr-sim: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-37778 being exploited?

CVE-2021-37778 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-2021-37778 affect?

CVE-2021-37778 affects gps-sdr-sim. Severity is critical (CVSS 9.8). There is a buffer overflow in gps-sdr-sim v1.0 when parsing long command line parameters, which can lead to DoS or code execution.

How urgent is CVE-2021-37778?

Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

← Back to latest CVEs