CVE-2026-44215

NanaZip: Heap out-of-bounds write in NanaZip UFS directory parser

HIGH
7.1
CVSS Score
Published: May 12, 2026 at 07:23 PM UTC
Updated: October 26, 2026 at 06:10 PM UTC
1 product affected across 1 vendorNanaZip

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Severity
HIGH7.1
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.0.1252.0 ≤ v < 6.0.1698.0
Affected range stops below 6.0.1698.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

x_refsource_CONFIRMExploitMitigationVendor Advisory
Source: cverecord
https://github.com/M2Team/NanaZip/security/advisories/GHSA-44wh-7gc3-w936

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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