CVE-2021-41387: seatd-launch in seatd 0.6.x before 0.6.2 allows privilege escalation because it uses execlp and may be install

This month

HIGH 8.8UPGRADE

CVE-2021-41387 is a high-severity flaw (CVSS 8.8) affecting seatd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

seatd-launch in seatd 0.6.x before 0.6.2 allows privilege escalation because it uses execlp and may be installed setuid root.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-426
Published	2021-09-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: seatd project

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

Am I affected?

Timeline

2021-09-17 21:15 UTCPublished CVE record published
2026-06-17 04:08 UTCUpdated Record last modified

seatd project seatd UPGRADE

Affected: >= 0.6.0 and < 0.6.2

Fixed in: 0.6.2

Safe to downgrade to: a release before 0.6.0

1. Check installed version

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

2. UPGRADE to 0.6.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade seatd

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 0.6.0 (Debian / Ubuntu)

apt-cache madison seatd sudo apt install seatd=<VERSION_BEFORE_0.6.0> sudo apt-mark hold seatd

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

dnf --showduplicates list seatd sudo dnf downgrade seatd-<VERSION_BEFORE_0.6.0> sudo dnf versionlock add seatd

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-2021-41387?

seatd: upgrade to 0.6.2. Exact commands for each OS are on this page.

Is CVE-2021-41387 being exploited?

CVE-2021-41387 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-2021-41387 affect?

CVE-2021-41387 affects seatd. Severity is high (CVSS 8.8). seatd-launch in seatd 0.6.x before 0.6.2 allows privilege escalation because it uses execlp and may be installed setuid root.

How urgent is CVE-2021-41387?

Priority 47/100. High severity

Related CVEs

CVE-2022-25643 CRITICAL 9.8 UPGRADE seatd-launch in seatd 0.6.x before 0.6.4 allows removing files with escalated privileges when installed setuid

References

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