---
id: CVE-2026-98755
title: 'tty: vcc: zero-initialize control packet in vcc_send_ctl()'
summary: |-
  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 uninitiali…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    6f1a08ef02825b440126c406ea63ef6128888e15
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    4335278d0e75395cbfaf71c84b521df56d69e936
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    399aa38af1d78001612e3130b2056ea392a355ca
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    1f71f565e3585da1098ff19ca3c24687dab59185
  - Linux < 6.12.113
  - Linux < 6.18.56
  - Linux < 7.2.10
  - Linux (all versions)
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:47:41.106Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98755'
references:
  - url: 'https://git.kernel.org/stable/c/6f1a08ef02825b440126c406ea63ef6128888e15'
  - url: 'https://git.kernel.org/stable/c/4335278d0e75395cbfaf71c84b521df56d69e936'
  - url: 'https://git.kernel.org/stable/c/399aa38af1d78001612e3130b2056ea392a355ca'
  - url: 'https://git.kernel.org/stable/c/1f71f565e3585da1098ff19ca3c24687dab59185'
tags:
  - cve.org
ingestedAt: '2026-10-18T16:47:32.497Z'
---

## Overview

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.

## Affected

- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6f1a08ef02825b440126c406ea63ef6128888e15`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4335278d0e75395cbfaf71c84b521df56d69e936`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 399aa38af1d78001612e3130b2056ea392a355ca`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1f71f565e3585da1098ff19ca3c24687dab59185`
- `Linux < 6.12.113`
- `Linux < 6.18.56`
- `Linux < 7.2.10`
- `Linux (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.