CVE-2024-11477
A public proof of concept exists; no exploitation attested.
- Published2024-11-22
- Fixed in24.07
- WeaknessCWE-191
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
7-Zip Zstandard Decompression Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the implementation of Zstandard decompression. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-24346.
Timeline
dates in UTC- 2024-11-2221:15CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-11477?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-11477?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · CISA-ADP| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 24.7 | < 24.07 | 24.07 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 24.x | ≥ 24.06, < 24.07 | 24.07 | CISA-ADP |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update 7-zip to 24.07
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 1 repository, unverifiedTheN00bBuilder/cve-2024-11477-writeup PoC-in-GitHub
Sources
- CISA-ADPSSVC decisionpoc2024-11-30
- OpenCVESSVC decisionpoc—
- NVDCVSS 3.17.8read 2026-10-23
- CNACVSS 3.07.8read 2026-10-23
- CNAweakness (CWE)CWE-191read 2026-10-23
- FIRST EPSSEPSS score22.4 %read 2026-10-23
- PoC-in-GitHubproof of concept1read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2024-11-22
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2024-11477?
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What is the CVSS score for CVE-2024-11477?
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