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NVD / CVE Program· CNA redhat

CVE-2026-58224: Samba: ctdb fails to do integrity checking of received packets

MediumCVSS 6.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.34% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: samba (Debian:13) 2:4.22.10+dfsg-0+deb13u2; samba (Debian:14) 2:4.24.5+dfsg-1; samba (openSUSE:Leap 16.0) 4.22.11+git.552.66cfeb7de0a-160000.1.1, 4.22.9+git.538.af6cb4fb2e-160000.1.1.

Low priority for now. Upgrade to samba (Debian:13) 2:4.22.10+dfsg-0+deb13u2; samba (Debian:14) 2:4.24.5+dfsg-1; samba (openSUSE:Leap 16.0) 4.22.11+git.552.66cfeb7de0a-160000.1.1, 4.22.9+git.538.af6cb4fb2e-160000.1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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 consumption and, in limited cases, disclose adjacent memory contents.

Published
Aug 14, 2026
Updated
Nov 5, 2026
EPSS
0.3% · 28th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
6.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-58224

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
sambasamba
redhatenterprise linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • redhat enterprise linux6.0
  • redhat enterprise linux7.0
  • samba sambaup to 4.2.0 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Ceph Storage 9.2

    • 1790843527 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown
    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsunknown

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat OpenShift Container Platform 5

    • all versionsunknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12sambafrom 0—
Debian:13sambabefore 2:4.22.10+dfsg-0+deb13u22:4.22.10+dfsg-0+deb13u2
Debian:14sambabefore 2:4.24.5+dfsg-12:4.24.5+dfsg-1
openSUSE:Leap 16.0sambabefore 4.22.11+git.552.66cfeb7de0a-160000.1.14.22.11+git.552.66cfeb7de0a-160000.1.1
openSUSE:Leap 16.0sambabefore 4.22.9+git.538.af6cb4fb2e-160000.1.14.22.9+git.538.af6cb4fb2e-160000.1.1
openSUSE:Tumbleweedsambabefore 4.24.5+git.481.dba78dbdea-1.14.24.5+git.481.dba78dbdea-1.1
SUSE:Enterprise Storage 7.1sambabefore 4.15.13+git.808.eeca19f5e1-150300.3.106.14.15.13+git.808.eeca19f5e1-150300.3.106.1
SUSE:Linux Enterprise High Availability Extension 12 SP5sambabefore 4.15.13+git.729.a8ce057e8d-3.109.14.15.13+git.729.a8ce057e8d-3.109.1
SUSE:Linux Enterprise High Availability Extension 15 SP6sambabefore 4.19.8+git.501.67274891bc-150600.3.29.14.19.8+git.501.67274891bc-150600.3.29.1
SUSE:Linux Enterprise Micro 5.3sambabefore 4.15.13+git.808.eeca19f5e1-150400.3.52.14.15.13+git.808.eeca19f5e1-150400.3.52.1
SUSE:Linux Enterprise Micro 5.5sambabefore 4.17.12+git.581.f49579c6cd-150500.3.42.14.17.12+git.581.f49579c6cd-150500.3.42.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7sambabefore 4.21.10+git.533.31d7e5508d-150700.3.29.14.21.10+git.533.31d7e5508d-150700.3.29.1
SUSE:Linux Micro 6.2sambabefore 4.22.9+git.538.af6cb4fb2e-160000.1.14.22.9+git.538.af6cb4fb2e-160000.1.1
SUSE:Linux Micro 6.2sambabefore 4.22.11+git.552.66cfeb7de0a-160000.1.14.22.11+git.552.66cfeb7de0a-160000.1.1

Same product

samba: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-7494Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious…KEV
    99Now
  • CVE-2015-0240The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before 4.1.17, and 4.2.x…
    66This week
  • CVE-2003-0085Buffer overflow in the SMB/CIFS packet fragment re-assembly code for SMB daemon (smbd) in Samba before 2.2.8, and Samba-TNG before 0.3.1…
    66This week

Published before and after this one in the same product

  • ← EarlierCVE-2026-2340May 27, 2026 · Samba: vfs_worm does not block directory modification
    26Monitor
  • ← EarlierCVE-2026-4408May 28, 2026 · Samba: remote code execution in samr
    53Plan
  • Later →CVE-2026-109411Oct 28, 2026 · Samba: access control bypass via vfs_ceph_rgw case-insensitive open
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:samba2:4.22.10+dfsg-0+deb13u2 · Debian:13Package registry (OSV)
opensuse:samba4.24.5+git.481.dba78dbdea-1.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:samba4.22.9+git.538.af6cb4fb2e-160000.1.1 · SUSE:Linux Micro 6.2Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-353 · Missing Support for Integrity Check

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records