CVE-2016-9296: 7-zip p7zip NULL Pointer Dereference
Vulnerability summary
CVE-2016-9296 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in 7-zip p7zip. EPSS estimates a 7.02% chance of exploitation in the next 30 days, higher than 94.1% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 12-11-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
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 metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
7.02%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
+1.21 pp
From 5.80% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (sourceforge.net)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
7-zip1 product
- p7zip16.02
Alpine1 product
- p7zip< 16.02-r1
Debian1 product
- p7zip< 16.02+dfsg-2
Ubuntu1 product
- p7zip< 16.02+dfsg-6
4 vendors · 4 products
References
9 links- sourceforge.net/p/p7zip/discussion/383043/thread/648d34db/X Refsource MISCExploitThird Party AdvisoryREPORT
- github.com/yangke/7zip-null-pointer-dereferenceX Refsource MISCIssue TrackingPatchThird Party AdvisoryREPORT
