CVE-2026-58224: A flaw was found in Samba's CTDB, the clustered database service used by Samba

Q: How do I fix CVE-2026-58224?

samba: upgrade to newer than 4.2.0; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2026-58224 being exploited?

CVE-2026-58224 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-2026-58224 affect?

CVE-2026-58224 affects samba, enterprise linux. Severity is medium (CVSS 6.5). A flaw was found in Samba's CTDB, the clustered database service used by Samba. Insufficient integrity validation of received CTDB protocol packets allows malformed packets containing invalid field lengths, improperly terminated strings, or

Q: How urgent is CVE-2026-58224?

Priority 35/100. On your watchlist

Routine

MEDIUM 6.5WATCHLISTUPGRADEMITIGATE

CVE-2026-58224 is a medium-severity flaw (CVSS 6.5) affecting samba, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in Samba's CTDB, the clustered database service used by Samba. Insufficient integrity validation of received CTDB protocol packets allows malformed packets containing invalid field lengths, improperly terminated strings, or inconsistent packet sizes to be processed without adequate bounds checking. A remote attacker with access to the CTDB private network may trigger a denial of service through process crashes or excessive memory

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-353
Published	2026-08-14
Last modified	2026-10-21

Publisher (CNA): Red Hat, Inc. · Vendor: redhat · samba

Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-14 15:17 UTCPublished CVE record published
2026-10-21 09:17 UTCUpdated Record last modified

samba samba UPGRADE

Affected: <= 4.2.0

Fixed in: newer than 4.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 4.2.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade samba

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat enterprise linux MITIGATE

Affected: 6.0 · 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

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.

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-2026-58224?

samba: upgrade to newer than 4.2.0; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-58224 being exploited?

CVE-2026-58224 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-2026-58224 affect?

CVE-2026-58224 affects samba, enterprise linux. Severity is medium (CVSS 6.5). A flaw was found in Samba's CTDB, the clustered database service used by Samba. Insufficient integrity validation of received CTDB protocol packets allows malformed packets containing invalid field lengths, improperly terminated strings, or

How urgent is CVE-2026-58224?

Priority 35/100. On your watchlist

Software pages

Samba vulnerabilities

Related CVEs

CVE-2026-4408 CRITICAL 9.0 DOWNGRADE UPGRADE A flaw was found in Samba
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-2026-3012 HIGH 8.0 DOWNGRADE UPGRADE A flaw was found in Samba’s certificate auto-enrollment Group Policy handling

References

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