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Vulnerability record · CVE-2016-9296 · published 12 November 2016

CVE-2016-9296: 7-zip p7zip null pointer dereference vulnerability

7 Zip · P7zip

A null pointer dereference bug affects the 16.02 and many old versions of p7zip. A lack of null pointer check for the variable folders.PackPositions in function CInArchive::ReadAndDecodePackedStreams in CPP/7zip/Archive/7z/7zIn.cpp, as used in the 7z.so library and in 7z applications, will cause a crash and a denial of service when decoding malformed 7z files.

7.5 CVSS 3.0 High EPSS 7.0% · top 6.0% CWE-476 · NULL pointer dereference
7.5CVSS 3.0 base score, v2 5.0
7.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A null pointer dereference bug affects the 16.02 and many old versions of p7zip. A lack of null pointer check for the variable folders.PackPositions in function CInArchive::ReadAndDecodePackedStreams in CPP/7zip/Archive/7z/7zIn.cpp, as used in the 7z.so library and in 7z applications, will cause a crash and a denial of service when decoding malformed 7z files.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/94294 Third Party AdvisoryVDB Entry
https://github.com/yangke/7zip-null-pointer-dereference Issue TrackingPatchThird Party Advisory
https://sourceforge.net/p/p7zip/bugs/185/ Issue TrackingThird Party Advisory
https://sourceforge.net/p/p7zip/discussion/383043/thread/648d34db/ ExploitThird Party Advisory
http://www.securityfocus.com/bid/94294 Third Party AdvisoryVDB Entry
https://github.com/yangke/7zip-null-pointer-dereference Issue TrackingPatchThird Party Advisory
https://sourceforge.net/p/p7zip/bugs/185/ Issue TrackingThird Party Advisory
https://sourceforge.net/p/p7zip/discussion/383043/thread/648d34db/ ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2022-470697-zip p7zip out-of-bounds write vulnerabilityp7zip 16.02 was discovered to contain a heap-buffer-overflow vulnerability via the function NArchive::NZip::CInArchive::FindCd(bool) at CPP/7zip/Arch…EPSS 0.32%7.8CVE-2018-59967-zip memory buffer overflow vulnerabilityInsufficient exception handling in the method NCompress::NRar3::CDecoder::Code of 7-Zip before 18.00 and p7zip can lead to multiple memory corruption…EPSS 2.9%7.8CVE-2017-179697-zip out-of-bounds write vulnerabilityHeap-based buffer overflow in the NCompress::NShrink::CDecoder::CodeReal method in 7-Zip before 18.00 and p7zip allows remote attackers to cause a de…EPSS 4.9%5.8CVE-2015-1038Fedoraproject fedora link following vulnerabilityp7zip 9.20.1 allows remote attackers to write to arbitrary files via a symlink attack in an archive.EPSS 3.3%6.2CVE-2026-21525Windows Remote Access Connection Manager null pointer dereference DoSWindows Remote Access Connection Manager contains a null pointer dereference (CWE-476) that lets an unauthorized attacker deny service locally. The f…KEVEPSS 4.8%analysed

Source: NIST National Vulnerability Database (record CVE-2016-9296), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.