CVE-2020-7039
No exploitation reported by the sources we read.
- Published2020-01-16
- WeaknessCWE-787
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
tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.
Timeline
dates in UTC- 2020-01-1623:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-7039?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-7039?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.0 | = 8.0 | no fix published | NVD |
| 9.0 | = 9.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.1 | = 4.1.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 15.1 | = 15.1 | no fix published | NVD |
1 more product in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- cockpit-podmanAlmaLinux:8all versions · fixed in 11-1.module_el8.5.0+108+00865455
- cockpit-podmanAlmaLinux:8all versions · fixed in 11-1.module_el8.5.0+2635+e4386a39
- containernetworking-pluginsAlmaLinux:8all versions · fixed in 0.7.4-4.git9ebe139.module_el8.3.0+2044+12421f43
- containernetworking-pluginsAlmaLinux:8all versions · fixed in 0.7.4-4.git9ebe139.module_el8.4.0+2496+12421f43
- containernetworking-pluginsAlmaLinux:8all versions · fixed in 0.7.4-4.git9ebe139.module_el8.5.0+119+9a9ec082
- containernetworking-pluginsAlmaLinux:8all versions · fixed in 0.8.3-4.module_el8.5.0+108+00865455
- containernetworking-pluginsAlmaLinux:8all versions · fixed in 0.8.3-4.module_el8.5.0+2635+e4386a39
- fuse-overlayfsAlmaLinux:8all versions · fixed in 0.3-5.module_el8.3.0+2044+12421f43
27 more package ranges on OSV.dev
Fix
Advisories and patches
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.15.6read 2026-10-23
- NVDCVSS 2.06.8read 2026-10-23
- NVDweakness (CWE)CWE-787read 2026-10-23
- FIRST EPSSEPSS score3.6 %2026-10-22
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- Published
- 2020-01-16
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-7039?
Is CVE-2020-7039 actively exploited?
What is the CVSS score for CVE-2020-7039?
Running netcf? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
No credit card required · No monthly cap on website lookups · 250 API requests/month
Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
- Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.
Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.