CVE-2026-49416
⚠️ highSummary
The CONS_HISTORY ioctl handler did not adequately validate the requested history size. A large value caused an integer overflow in the buffer size calculation, resulting in a heap allocation smaller than expected. Subsequent initialization of the buffer wrote beyond the end of the allocation. An unprivileged local user with access to a vt(4) device can trigger an out-of-bounds write in the kernel, potentially escalating privileges.
CVSS Score
7.8
High
EPSS Score
0.1
Exploit Probability
Published Date
2026-06-27
First Seen: 2026-06-28
📊 Relative Risk Intelligence
This CVE is Moderate Risk - more severe than 69.4% of all 338,295 vulnerabilities in our database.
#103,392
Above average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Jun 29, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
🏆 Discovered By
Ed Maste
SSVC data provided by
CISA
Last Modified
2026-07-01
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)