Util linux: [Integer Overflow or Wraparound in libblkid/src/partitions/dos.c] (CVE-2026-53615)
Description
An integer overflow or wraparound vulnerability exists in the libblkid component of util-linux, specifically in the src/partitions/dos.c file. This vulnerability is identified as CVE-2026-53615 and affects multiple versions of util-linux. The CVSS 3.1 base score is 8.0, indicating a high severity with local attack vector, low attack complexity, no privileges required, no user interaction, unchanged scope, low confidentiality impact, high integrity impact, and high availability impact. A patch is available from the vendor to address this issue.
CVSS v3.1
Score 8.0high
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=questingpkg:deb/ubuntu/util-linux?arch=source&distro=stonkingpkg:deb/ubuntu/util-linux?arch=source&distro=resoluteRun 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
CVE-2026-53615 is an integer overflow or wraparound vulnerability in the libblkid library of util-linux, specifically in the src/partitions/dos.c source file. This flaw could potentially lead to integrity and availability impacts due to improper handling of integer values during partition processing. The vulnerability has been assigned a CVSS 3.1 score of 8.0, reflecting its potential severity. Multiple versions of util-linux, including various Ubuntu package versions, are affected. The vendor has released patches to mitigate this vulnerability.
Potential Impact
The vulnerability could allow an attacker with local access to cause integrity and availability issues in the affected system due to integer overflow or wraparound in partition handling code. The confidentiality impact is low, but integrity and availability impacts are high. No known exploits are reported in the wild at this time.
Mitigation Recommendations
A vendor-provided patch is available and should be applied to affected systems. Refer to the Ubuntu security notice USN-8702-1 for patch details and update instructions. Applying the official fix will mitigate the vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-53615
- 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:25.10","Ubuntu:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Patch Information
Threat ID: 6ad3f6032cdf04f656664016
Added to database: 10/17/2026, 22:26:11 UTC
Last enriched: 10/18/2026, 00:53:10 UTC
Last updated: 10/18/2026, 00:53:10 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.