Insufficient Resource Pool Affecting samba package, versions <2:4.23.6+dfsg-1ubuntu2.2


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1.1% (63rd percentile)

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  • Snyk IDSNYK-UBUNTU2604-SAMBA-18363705
  • published28 Jul 2026
  • disclosed30 Jul 2026

Introduced: 28 Jul 2026

NewCVE-2026-58218  (opens in a new tab)
CWE-410  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.04 samba to version 2:4.23.6+dfsg-1ubuntu2.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba package and not the samba package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration requests were added to the TKEY name cache before being rejected. A remote, unauthenticated attacker can exploit this behavior by sending a large number of TKEY requests with arbitrary names, exhausting the cache and evicting legitimate TKEY entries. This can prevent legitimate TSIG authentication for signed DNS queries, resulting in a denial of service.

CVSS Base Scores

version 3.1