Out-of-Bounds Write in snes9x (CVE-2026-39199)
Summary
Out-of-bounds write in snes9x (CVE-2026-39199). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
snes9x 1.63 allows an out-of-bounds write and denial of service via a crafted .ups file.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2026-39199 was discovered in snes9x.
In plain terms, it is an out-of-bounds write that can let attackers hijack the program.
Severity is Low (CVSS 2.9/10). Real-world exploitation is unlikely but a fix is still recommended.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "snes9x CVE-2026-39199".
CVE-2026-39199 (snes9x). Severity: Low / CVSSv3 2.9. Category: CWE-787.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2026-39199) in snes9x. In plain words, it is an out-of-bounds write that can let attackers hijack the program.
Target versions of snes9x (see vendor advisory). If running in production, identify exposure immediately.
Severity: Low (CVSS 2.9/10). Real-world exploitation is unlikely but a fix is still recommended.
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-787)
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-39199 libretro-snes9x
- Ubuntu UBUNTU-CVE-2026-39199 libretro-snes9x
References
- web nvd.nist.gov
- web cve@mitre.org
- web cve@mitre.org
- web karansaini.com
- web github.com
- web cve@mitre.org