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VulnerabilityPublished Updated

CVE-2026-8343: ui · fix validation of VNC extended clipboard data length

Affects qemuSource GCVE Database

0

Not known to be exploited.

Data as of 22 Oct 2026, 20:24 UTC

Severity
Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10qemupkg:deb/ubuntu/qemu?arch=source&distro=stonkingOther threatsAffected
  • 1:10.2.1+ds-1ubuntu3 – 1:11.0.3+ds-2ubuntu2
4 affected builds
Fixed in–
Ubuntu 26.10qemu-hwepkg:deb/ubuntu/qemu-hwe?arch=source&distro=stonkingOther threatsAffected
  • 1:10.2.1+ds-1ubuntu4 – 1:11.0.3+ds-2ubuntu4
5 affected builds
Fixed in–
Ubuntu 26.04 LTSqemupkg:deb/ubuntu/qemu?arch=source&distro=resoluteOther threatsAffected
  • 1:10.1.0+ds-5ubuntu2 – 1:10.2.1+ds-1ubuntu3.3
10 affected builds
Fixed in–
Ubuntu 26.04 LTSqemu-hwepkg:deb/ubuntu/qemu-hwe?arch=source&distro=resoluteOther threatsAffected
  • 1:10.2.1+ds-1ubuntu2 – 1:10.2.1+ds-1ubuntu4.4
5 affected builds
Fixed in–
Ubuntu 25.10qemupkg:deb/ubuntu/qemu?arch=source&distro=questingOther threatsAffected
  • 1:9.2.1+ds-1ubuntu5 – 1:10.1.0+ds-5ubuntu2.7
12 affected builds
Fixed in–
Ubuntu 24.04 LTSqemupkg:deb/ubuntu/qemu?arch=source&distro=nobleOther threatsAffected
  • 1:8.0.4+dfsg-1ubuntu3 – 1:8.2.2+ds-0ubuntu1.18
24 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

ui: fix validation of VNC extended clipboard data length

References

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