CVE-2026-49420
⚠️ highSummary
The RTSP handler in libalias rewrote outgoing packets into a fixed-length stack buffer without checking whether the rewritten data fit in the buffer, or whether the result fit back in the original packet. A host sending crafted RTSP traffic from inside a NAT gateway using libalias can overflow a stack buffer, potentially achieving remote code execution in the kernel (when using ipfw(4) NAT) or in the natd(8) process (which generally runs as the root user).
CVSS Score
8.8
High
EPSS Score
0.3
Exploit Probability
Published Date
2026-08-19
First Seen: 2026-08-20
📊 Relative Risk Intelligence
This CVE is High Risk - more severe than 80.8% of all 360,673 vulnerabilities in our database.
#69,256
Top 25% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: Aug 19, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
🏆 Discovered By
Atuin - Automated Vulnerability Discovery Engine, Tianchu Chen of Tencent Xuanwu Lab
UC Berkeley Antiproof
Stanislav Fort of Aisle Research
SSVC data provided by
CISA
Last Modified
2026-09-01
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)