util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to… (CVE-2026-76642)
Description
CVE-2026-76642 is a vulnerability in util-linux affecting multiple specific versions on various Ubuntu LTS releases. It involves failure to check the mount helper exit status before running post-mount hooks. The CVSS 3.1 base score is 7.8, indicating medium severity with high impact on confidentiality, integrity, and availability. No detailed technical information or known exploits are currently available. Patch or remediation details have not been provided.
CVSS v3.1
Score 7.8high
Affected software
pkg:deb/ubuntu/util-linux?arch=source&distro=trustypkg:deb/ubuntu/util-linux?arch=source&distro=esm-infra/xenialpkg:deb/ubuntu/util-linux?arch=source&distro=bionicpkg:deb/ubuntu/util-linux?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/util-linux?arch=source&distro=jammypkg:deb/ubuntu/util-linux?arch=source&distro=noblepkg:deb/ubuntu/util-linux?arch=source&distro=resolutepkg:deb/ubuntu/util-linux?arch=source&distro=stonkingRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-76642 affects util-linux versions through 2.41.5 and 2.42.2, specifically multiple versions packaged for Ubuntu LTS releases. The issue arises because util-linux fails to verify the exit status of the mount helper before executing post-mount hooks. This flaw could potentially allow unprivileged users to influence system behavior after mounting operations. The CVSS 3.1 score of 7.8 reflects a medium severity with high impact on confidentiality, integrity, and availability. No exploits in the wild or detailed technical descriptions are currently available, and no patch or remediation information has been provided in the source data.
Potential Impact
The vulnerability has a CVSS 3.1 base score of 7.8, indicating a medium severity level with high impact on confidentiality, integrity, and availability. This suggests that exploitation could lead to significant unauthorized access or system compromise. However, no known exploits are reported in the wild, and the exact exploitation method is not detailed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-76642
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6a9c2595acd9273b49fbdf45
Added to database: 09/05/2026, 14:22:13 UTC
Last enriched: 10/18/2026, 02:41:01 UTC
Last updated: 10/20/2026, 18:48:23 UTC
Views: 58
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