Bug 2443638 (CVE-2026-3389)

Summary: CVE-2026-3389 squirrel: Squirrel: Denial of Service via null pointer dereference
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Squirrel. A local user can exploit this null pointer dereference vulnerability by performing a manipulation in the `sqstd_rex_newnode` function. This can lead to a Denial of Service (DoS), making the affected system or application unavailable.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2443806, 2443809, 2443810, 2443811    
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Description OSIDB Bzimport 2026-03-01 11:01:14 UTC 
A vulnerability was determined in Squirrel up to 3.2. This vulnerability affects the function sqstd_rex_newnode in the library sqstdlib/sqstdrex.cpp. Executing a manipulation can lead to null pointer dereference. The attack can only be executed locally. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.