CVE-2026-44215
NanaZip: Heap out-of-bounds write in NanaZip UFS directory parser
4.4CVSSMEDIUM
Description
NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a one-byte heap out-of-bounds null write exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS filesystem image. The attacker controls the byte offset of the write within a ~254-byte window past the heap allocation boundary. This vulnerability is fixed in 6.0.1698.0.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:RUser InteractionRequired
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:LIntegrityLow
A:LAvailabilityLow
Weaknesses
Affected Products
Attack Graph
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Exploitability
Workaround Available
MITRE ATT&CK
2 techniques Initial Access
Privilege Escalation
References
Timeline
Published
May 12, 2026
Last Updated
May 14, 2026
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