How severe is CVE-2026-42442?

CVE-2026-42442 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-42442 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42442?

CVE-2026-42442 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42442?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-42442 have an EU (EUVD) identifier?

Yes. CVE-2026-42442 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29787.

When was CVE-2026-42442 published?

CVE-2026-42442 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-42442

CVE-2026-42442 is a low-severity vulnerability in M2team Nanazip with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29787
Weakness: CWE-476
Affected product: M2team Nanazip
Published: 2026-05-12
Last modified: 2026-06-17

Description

NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the root inode (inode 2) is set to IFLNK (symlink) instead of IFDIR (directory). The parser unconditionally treats the root inode as a directory without checking its type, and when the symlink has an embedded target (small di_size), the directory data buffer is zero-length, causing a null-pointer dereference on the first read. This vulnerability is fixed in 6.0.1698.0.

Frequently asked questions

What is CVE-2026-42442?: NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the root inode (inode 2) is set to IFLNK (symlink) instead of IFDIR (directory). The parser unconditionally treats the root inode as a directory without checking its type, and when the symlink has an embedded target (small di_size), the directory data buffer is zero-length, causing a null-pointer dereference on the first read. This vulnerability is fixed in 6.0.1698.0.
How severe is CVE-2026-42442?: CVE-2026-42442 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-42442 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42442?: CVE-2026-42442 affects M2team Nanazip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42442?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42442 have an EU (EUVD) identifier?: Yes. CVE-2026-42442 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29787.
When was CVE-2026-42442 published?: CVE-2026-42442 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://github.com/M2Team/NanaZip/security/advisories/GHSA-8r4x-fx3w-ph77

Affected products (1)

cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:*

More vulnerabilities in M2team Nanazip

CVE-2026-27114 — High (CVSS 7.5): NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, circular…
CVE-2026-27711 — Medium (CVSS 6.6): NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0,…
CVE-2026-27709 — Medium (CVSS 6.6): NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0,…
CVE-2026-26282 — Medium (CVSS 6.6): NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, NanaZip has an…
CVE-2026-27014 — Medium (CVSS 5.5): NanaZip is an open source file archive Starting in version 5.0.1252.0 and prior to version 6.0.1630.0, circular…
CVE-2026-27710 — Medium (CVSS 5.0): NanaZip is an open source file archive. Starting in version 5.0.1252.0 and prior to versions 6.0.1638.0 and 6.5.1638.0,…

All CVEs affecting M2team Nanazip →

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

CVE-2022-36648 — Critical (CVSS 10.0): The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier,…
CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…

Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →