Insufficient Resource Pool Affecting samba-client package, versions <2:4.17.12-1.amzn2023.0.7


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.78% (55th percentile)

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  • Snyk IDSNYK-AMZN2023-SAMBACLIENT-19816486
  • published15 Sept 2026
  • disclosed30 Jul 2026

Introduced: 30 Jul 2026

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

How to fix?

Upgrade Amazon-Linux:2023 samba-client to version 2:4.17.12-1.amzn2023.0.7 or higher.
This issue was patched in ALAS2023-2026-2135.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba-client package and not the samba-client package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 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