Bug 2538158 (CVE-2026-94054)

Summary: CVE-2026-94054 exim: Exim: Arbitrary code execution via attacker-controlled Proxy-Protocol
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 Exim. When the Proxy-Protocol is used with an attacker-controlled proxy, a remote attacker could exploit an out-of-bounds write vulnerability. This could lead to data corruption, denial of service, or potentially arbitrary code execution, allowing the attacker to execute malicious code on the system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2539249, 2539250    
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Description OSIDB Bzimport 2026-09-22 17:20:04 UTC 
Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.