CVE-2002-0351: Buffer overflows in CFS daemon (cfsd) before 1.3.3-8.1, and 1.4x before 1.4.1-5, allow remote attackers to cau

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HIGH 7.5DOWNGRADE

CVE-2002-0351 is a high-severity flaw (CVSS 7.5) affecting cfs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflows in CFS daemon (cfsd) before 1.3.3-8.1, and 1.4x before 1.4.1-5, allow remote attackers to cause a denial of service and possibly execute arbitrary code.

Why this priority

High severity
EPSS top 9%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Published	2002-06-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: matt blaze

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

Am I affected?

Timeline

2002-06-25 04:00 UTCPublished CVE record published
2026-06-16 21:57 UTCUpdated Record last modified

matt blaze cfs DOWNGRADE

Affected: 1.3.3 · 1.3.3_alpha · 1.3.3_arm · 1.3.3_ia32 · 1.3.3_m68k · 1.3.3_ppc · 1.3.3_sparc

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.3.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.3.3 (Debian / Ubuntu)

apt-cache madison cfs sudo apt install cfs=<VERSION_BEFORE_1.3.3> sudo apt-mark hold cfs

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cfs sudo dnf downgrade cfs-<VERSION_BEFORE_1.3.3> sudo dnf versionlock add cfs

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-2002-0351?

cfs: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0351 being exploited?

CVE-2002-0351 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-2002-0351 affect?

CVE-2002-0351 affects cfs. Severity is high (CVSS 7.5). Buffer overflows in CFS daemon (cfsd) before 1.3.3-8.1, and 1.4x before 1.4.1-5, allow remote attackers to cause a denial of service and possibly execute arbitrary code.

How urgent is CVE-2002-0351?

Priority 49/100. High severity; EPSS top 9%: very likely to be exploited

References

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