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Fencer Vulns
high 7.5

CVE-2016-9296 json

A null pointer dereference bug affects the 16.02 and many old versions of p7zip.

published 2016-11-12 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10107

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.0%
EPSS 7.0% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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.

Patch / fix

  • p7zip Debian 13, Debian 12 16.02+dfsg-2

debian advisories DEBIAN-CVE-2016-9296

  • p7zip openSUSE Tumbleweed 16.02-2.1

opensuse advisories openSUSE-SU-2024:10322-1

  • p7zip Alpine 3.17, Alpine 3.16, Alpine 3.15 +10 more 16.02-r1

alpine advisories ALPINE-CVE-2016-9296

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • p7zip Azure Linux 3.0 16.02-23
  • p7zip CBL-Mariner 2.0 16.02-22

azure linux advisories AZL-35091AZL-6782

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-9296 updated cvss 3.3

p7zip: Null pointer dereference in 7zIn.cpp

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.02% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • sourceforge.net https://sourceforge.net/p/p7zip/discussion/383043/thread/648d34db/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.