CVE-2026-98755 tty: vcc: zero-initialize control packet in vcc_send_ctl()
An attacker with local access can read uninitialized kernel stack data via the VCC driver, potentially exposing sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98755?
CVE-2026-98755 is a vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
tty: vcc: zero-initialize control packet in vcc_send_ctl()
The stack-allocated struct vio_vcc pkt was partially initialized, leaving the tag.stype_env field uninitialized before being sent via ldc_write(), potentially leaking kernel stack data to the LDC peer.
Which versions are affected by CVE-2026-98755?
How do I fix CVE-2026-98755?
Apply the vendor's patch.
Is CVE-2026-98755 being exploited?
There is no known exploitation of CVE-2026-98755 in the wild and no public exploit code.
Sources
Also known as AZL-108725, BELL-CVE-2026-98755, DEBIAN-CVE-2026-98755, GHSA-g66w-7p4m-7w28, UBUNTU-CVE-2026-98755.