Vulnerability Description
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.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-49416?
CVE-2026-49416 is a documented vulnerability. 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 ...
How severe is CVE-2026-49416?
CVSS scoring is not yet available for CVE-2026-49416. Check NVD for updates.
Is there a patch for CVE-2026-49416?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.