CVE-2009-0342: Niels Provos Systrace before 1.6f on the x86_64 Linux platform allows local users to bypass intended access re

Q: How do I fix CVE-2009-0342?

systrace: upgrade to newer than 1.6e. Exact commands for each OS are on this page.

Q: Is CVE-2009-0342 being exploited?

CVE-2009-0342 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-2009-0342 affect?

CVE-2009-0342 affects systrace. Severity is high (CVSS 7.2). Niels Provos Systrace before 1.6f on the x86_64 Linux platform allows local users to bypass intended access restrictions by making a 64-bit syscall with a syscall number that corresponds to a policy-compliant 32-bit syscall.

Q: How urgent is CVE-2009-0342?

Priority 45/100. High severity; Public exploit reference; On your watchlist

This month

HIGH 7.2WATCHLISTUPGRADE

CVE-2009-0342 is a high-severity flaw (CVSS 7.2) affecting systrace. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Niels Provos Systrace before 1.6f on the x86_64 Linux platform allows local users to bypass intended access restrictions by making a 64-bit syscall with a syscall number that corresponds to a policy-compliant 32-bit syscall.

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-264
Published	2009-01-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: provos

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2009-01-29 19:30 UTCPublished CVE record published
2026-06-16 23:04 UTCUpdated Record last modified

provos systrace UPGRADE

Affected: <= 1.6e · 1.1 · 1.2 · 1.3 · 1.4 · 1.5 · 1.6 · 1.6a

Fixed in: newer than 1.6e

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.6e (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade systrace

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-2009-0342?

systrace: upgrade to newer than 1.6e. Exact commands for each OS are on this page.

Is CVE-2009-0342 being exploited?

CVE-2009-0342 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-2009-0342 affect?

CVE-2009-0342 affects systrace. Severity is high (CVSS 7.2). Niels Provos Systrace before 1.6f on the x86_64 Linux platform allows local users to bypass intended access restrictions by making a 64-bit syscall with a syscall number that corresponds to a policy-compliant 32-bit syscall.

How urgent is CVE-2009-0342?

Priority 45/100. High severity; Public exploit reference; On your watchlist

Related CVEs

CVE-2009-0343 HIGH 7.2 UPGRADE Niels Provos Systrace 1.6f and earlier on the x86_64 Linux platform allows local users to bypass intended acce
CVE-2007-4773 CRITICAL 9.8 UPGRADE Systrace before 1.6.0 has insufficient escape policy enforcement.

References

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