Uncontrolled Recursion Affecting fence-agents-apc-snmp package, versions <0:4.10.0-98.el9_7.13


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-ALMALINUX9-FENCEAGENTSAPCSNMP-16478417
  • published7 May 2026
  • disclosed6 May 2026

Introduced: 6 May 2026

NewCVE-2026-30922  (opens in a new tab)
CWE-674  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 fence-agents-apc-snmp to version 0:4.10.0-98.el9_7.13 or higher.
This issue was patched in ALSA-2026:13917.

NVD Description

Note: Versions mentioned in the description apply only to the upstream fence-agents-apc-snmp package and not the fence-agents-apc-snmp package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the pyasn1 library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested SEQUENCE (0x30) or SET (0x31) tags with "Indefinite Length" (0x80) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a RecursionError or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (MAX_OID_ARC_CONTINUATION_OCTETS) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue.

CVSS Base Scores

version 3.1