Bug 2547992 (CVE-2026-107635)

Summary: CVE-2026-107635 dislocker: dislocker: Denial of Service via crafted BitLocker volume image
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 dislocker. An integer underflow vulnerability in metadata parsing functions can lead to a Denial of Service (DoS) by crashing the application. By providing a maliciously crafted BitLocker volume image with an invalid datum size, an attacker can trigger an out-of-bounds memory read, causing dislocker to terminate unexpectedly.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2548569, 2548573    
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Description OSIDB Bzimport 2026-10-08 14:29:57 UTC 
Dislocker through 0.7.3 contains an integer underflow vulnerability in get_vmk() and get_fvek() that allows attackers to trigger out-of-bounds heap reads via crafted datum sizes. Attackers can supply a malicious BitLocker volume image with a datum_size smaller than the 36-byte AES-CCM header, causing hexdump() to over-read and crash dislocker.