CVE-2016-20043: NRSS RSS Reader 0.3.9-1 contains a stack buffer overflow vulnerability that allows local attackers to execute

Q: How do I fix CVE-2016-20043?

nrss: upgrade to newer than 0.3.9-1. Exact commands for each OS are on this page.

Q: Is CVE-2016-20043 being exploited?

CVE-2016-20043 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2016-20043 affect?

CVE-2016-20043 affects nrss. Severity is high (CVSS 8.4). NRSS RSS Reader 0.3.9-1 contains a stack buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized argument to the -F parameter. Attackers can craft a malicious input with 256 bytes of pad

Q: How urgent is CVE-2016-20043?

Priority 37/100. High severity; Public exploit reference

Routine

HIGH 8.4UPGRADE

CVE-2016-20043 is a high-severity flaw (CVSS 8.4) affecting nrss. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NRSS RSS Reader 0.3.9-1 contains a stack buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized argument to the -F parameter. Attackers can craft a malicious input with 256 bytes of padding followed by a controlled EIP value to overwrite the return address and achieve code execution.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-03-28
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: nrss

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

Am I affected?

Timeline

2026-03-28 12:16 UTCPublished CVE record published
2026-06-17 00:43 UTCUpdated Record last modified

nrss nrss UPGRADE

Affected: <= 0.3.9-1

Fixed in: newer than 0.3.9-1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.3.9-1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nrss

Note

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

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-2016-20043?

nrss: upgrade to newer than 0.3.9-1. Exact commands for each OS are on this page.

Is CVE-2016-20043 being exploited?

CVE-2016-20043 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-2016-20043 affect?

CVE-2016-20043 affects nrss. Severity is high (CVSS 8.4). NRSS RSS Reader 0.3.9-1 contains a stack buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized argument to the -F parameter. Attackers can craft a malicious input with 256 bytes of pad

How urgent is CVE-2016-20043?

Priority 37/100. High severity; Public exploit reference

References

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