CVE-2019-15901: An issue was discovered in slicer69 doas before 6.2 on certain platforms other than OpenBSD

Q: How do I fix CVE-2019-15901?

doas: upgrade to 6.2. Exact commands for each OS are on this page.

Q: Is CVE-2019-15901 being exploited?

CVE-2019-15901 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-2019-15901 affect?

CVE-2019-15901 affects doas. Severity is high (CVSS 8.8). An issue was discovered in slicer69 doas before 6.2 on certain platforms other than OpenBSD. A setusercontext(3) call with flags to change the UID, primary GID, and secondary GIDs was replaced (on certain platforms: Linux and possibly NetBS

Q: How urgent is CVE-2019-15901?

Priority 56/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2019-15901 is a high-severity flaw (CVSS 8.8) affecting doas. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in slicer69 doas before 6.2 on certain platforms other than OpenBSD. A setusercontext(3) call with flags to change the UID, primary GID, and secondary GIDs was replaced (on certain platforms: Linux and possibly NetBSD) with a single setuid(2) call. This resulted in neither changing the group id nor initializing secondary group ids.

Why this priority

High severity
Public exploit reference

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	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-269
Published	2019-10-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: doas project

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

Am I affected?

Timeline

2019-10-18 16:15 UTCPublished CVE record published
2026-06-17 02:21 UTCUpdated Record last modified

doas project doas UPGRADE

Affected: < 6.2

Fixed in: 6.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 6.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade doas

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-2019-15901?

doas: upgrade to 6.2. Exact commands for each OS are on this page.

Is CVE-2019-15901 being exploited?

CVE-2019-15901 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-2019-15901 affect?

CVE-2019-15901 affects doas. Severity is high (CVSS 8.8). An issue was discovered in slicer69 doas before 6.2 on certain platforms other than OpenBSD. A setusercontext(3) call with flags to change the UID, primary GID, and secondary GIDs was replaced (on certain platforms: Linux and possibly NetBS

How urgent is CVE-2019-15901?

Priority 56/100. High severity; Public exploit reference

Related CVEs

CVE-2019-15900 CRITICAL 9.8 UPGRADE An issue was discovered in slicer69 doas before 6.2 on certain platforms other than OpenBSD

References

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