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UBUNTU SECURITY NOTICECANONICALVERIFIED

PUBLISHER UPDATE · USN-8845-1

USN-8845-1 release notes and known issues

USN-8845-1: GVfs vulnerabilities

Scope: Ubuntu. This update record adds version, fix and known-issue context. Its publication date is not a lifecycle boundary.

Summary

Keith Linneman discovered that GVfs did not properly validate data received from SFTP servers. An attacker could possibly use this issue to cause a heap buffer overflow, resulting in arbitrary code execution or a denial of service. (CVE-2026-84268) It was discovered that GVfs incorrectly handled file ownership when creating private D-Bus sockets in the admin backend. A local attacker could possibly use this issue to change the ownership of arbitrary system files, resulting in privilege escalation to root. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-88924)

Improvements and security content

  • Keith Linneman discovered that GVfs did not properly validate data received from SFTP servers. An attacker could possibly use this issue to cause a heap buffer overflow, resulting in arbitrary code execution or a denial of service. (CVE-2026-84268) It was discovered that GVfs incorrectly handled file ownership when creating private D-Bus sockets in the admin backend. A local attacker could possibly use this issue to change the ownership of arbitrary system files, resulting in privilege escalation to root. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-88924)

Known issues

Publisher statement

Not stated. The verified publisher record does not contain a known-issues statement.

Affected products and versions

Products

  • Ubuntu

Affected versions

  • 22.04
  • 24.04
  • 26.04

Fixed versions or updates

  • No fixed version is stated in this record.

Recommended action

Review the official publisher document before deployment.

Related vulnerabilities

BlackTree CVE Intelligence
CVE-2026-84268Open CVE report →CVE-2026-88924Open CVE report →

These links connect the publisher update to related Lifecycle records without treating the update publication date as an end-of-support date.

Ubuntu 24.04 LTSOpen lifecycle record →

Official publisher evidence

CANONICALVERIFIED

USN-8845-1: GVfs vulnerabilities

Checked 2 Oct 2026. BlackTree preserves the last verified facts if a later source check is temporarily unavailable.

Open the official publisher source