CVE-2004-0807: Samba 3.0.6 and earlier allows remote attackers to cause a denial of service (infinite loop and memory exhaust

This month

MEDIUM 5.0WATCHLISTDOWNGRADEDOWNGRADEMITIGATE

CVE-2004-0807 is a medium-severity flaw (CVSS 5.0) affecting samba, samba, linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Samba 3.0.6 and earlier allows remote attackers to cause a denial of service (infinite loop and memory exhaustion) via certain malformed requests that cause new processes to be spawned and enter an infinite loop.

Why this priority

EPSS top 7%: very likely to be exploited
On your watchlist

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	5.5% (top 7%)
CISA exploited list	No
Published	2004-09-13
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: conectiva · mandrakesoft · samba · sgi · suse

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

Am I affected?

Timeline

2004-09-13 04:00 UTCPublished CVE record published
2026-06-16 22:06 UTCUpdated Record last modified

samba samba DOWNGRADE

Affected: 3.0.0 · 3.0.1 · 3.0.2 · 3.0.2a · 3.0.3 · 3.0.4 · 3.0.4 rc1 · 3.0.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison samba sudo apt install samba=<VERSION_BEFORE_3.0.0> sudo apt-mark hold samba

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

dnf --showduplicates list samba sudo dnf downgrade samba-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add samba

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.

sgi samba DOWNGRADE

Affected: 3.0 · 3.0.1 · 3.0.2 · 3.0.3 · 3.0.4 · 3.0.5 · 3.0.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison samba sudo apt install samba=<VERSION_BEFORE_3.0> sudo apt-mark hold samba

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

dnf --showduplicates list samba sudo dnf downgrade samba-<VERSION_BEFORE_3.0> sudo dnf versionlock add samba

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.

conectiva linux MITIGATE

Affected: 9.0 · 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

mandrakesoft mandrake linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

suse suse linux MITIGATE

Affected: 8 · 8.1 · 8.2 · 9.0 · 9.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 8

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2004-0807?

samba: downgrade or apply the listed mitigation; samba: downgrade or apply the listed mitigation; linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-0807 being exploited?

CVE-2004-0807 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-2004-0807 affect?

CVE-2004-0807 affects samba, samba, linux. Severity is medium (CVSS 5.0). Samba 3.0.6 and earlier allows remote attackers to cause a denial of service (infinite loop and memory exhaustion) via certain malformed requests that cause new processes to be spawned and enter an infinite loop.

How urgent is CVE-2004-0807?

Priority 46/100. EPSS top 7%: very likely to be exploited; On your watchlist

Software pages

Samba vulnerabilities

Related CVEs

CVE-2026-1933 HIGH 7.1 DOWNGRADE UPGRADE A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes
CVE-2026-4408 CRITICAL 9.0 DOWNGRADE UPGRADE A flaw was found in Samba
CVE-2026-3012 HIGH 8.0 DOWNGRADE UPGRADE A flaw was found in Samba’s certificate auto-enrollment Group Policy handling
CVE-2026-58224 MEDIUM 6.5 UPGRADE MITIGATE A flaw was found in Samba's CTDB, the clustered database service used by Samba
CVE-2026-2340 MEDIUM 6.5 DOWNGRADE DOWNGRADE A flaw was found in Samba’s vfs_worm module

References

← Back to latest CVEs