CVE-2009-0343: Niels Provos Systrace 1.6f and earlier on the x86_64 Linux platform allows local users to bypass intended acce

Q: How do I fix CVE-2009-0343?

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

Q: Is CVE-2009-0343 being exploited?

CVE-2009-0343 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-2009-0343 affect?

CVE-2009-0343 affects systrace. Severity is high (CVSS 7.2). Niels Provos Systrace 1.6f and earlier on the x86_64 Linux platform allows local users to bypass intended access restrictions by making a 32-bit syscall with a syscall number that corresponds to a policy-compliant 64-bit syscall, related to

Q: How urgent is CVE-2009-0343?

Priority 49/100. High severity; Public exploit reference; On your watchlist

This month

HIGH 7.2WATCHLISTUPGRADE

CVE-2009-0343 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 1.6f and earlier on the x86_64 Linux platform allows local users to bypass intended access restrictions by making a 32-bit syscall with a syscall number that corresponds to a policy-compliant 64-bit syscall, related to race conditions that occur in monitoring 64-bit processes.

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	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-264
Published	2009-01-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: niels 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

niels 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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Systrace 1.x (Linux Kernel x64) - Aware Local Privilege Escalation

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-2009-0343?

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

Is CVE-2009-0343 being exploited?

CVE-2009-0343 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-2009-0343 affect?

CVE-2009-0343 affects systrace. Severity is high (CVSS 7.2). Niels Provos Systrace 1.6f and earlier on the x86_64 Linux platform allows local users to bypass intended access restrictions by making a 32-bit syscall with a syscall number that corresponds to a policy-compliant 64-bit syscall, related to

How urgent is CVE-2009-0343?

Priority 49/100. High severity; Public exploit reference; On your watchlist

Related CVEs

CVE-2009-0342 HIGH 7.2 UPGRADE Niels Provos Systrace before 1.6f on the x86_64 Linux platform allows local users to bypass intended access re
CVE-2007-4773 CRITICAL 9.8 UPGRADE Systrace before 1.6.0 has insufficient escape policy enforcement.

References

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