Libgit2: [Unknown description] (CVE-2026-53587)
A vulnerability in libgit2 affecting certain Ubuntu LTS releases allows a remote attacker to cause a denial of service. The issue involves incorrect handling of certain capability buffers in the Git Smart Protocol. This vulnerability has a CVSS 3.1 base score of 7.5, indicating a medium severity level. Multiple Ubuntu LTS versions are affected, and patches are available to remediate the issue.
AI Analysis
Technical Summary
CVE-2026-53587 is a vulnerability in libgit2 where the software incorrectly handles certain capability buffers in the Git Smart Protocol. This flaw could be exploited by a remote attacker to cause a denial of service condition. The vulnerability affects multiple Ubuntu LTS releases, including 24.04 and 26.04. The CVSS 3.1 vector indicates the attack requires no privileges or user interaction and can be exploited remotely over the network. A patch is available from Ubuntu as detailed in security notice USN-8628-1.
Potential Impact
The vulnerability allows a remote attacker to cause denial of service on affected systems running vulnerable versions of libgit2. There is no confirmed impact on confidentiality or integrity. No known exploits are currently reported in the wild.
Mitigation Recommendations
A fix is available and should be applied by updating libgit2 to the patched versions provided by Ubuntu. The vendor advisory (USN-8628-1) recommends performing a standard system update to obtain the necessary security patches. Systems using Ubuntu Pro can apply fixes via Extended Security Maintenance (ESM) where applicable.
Libgit2: [Unknown description] (CVE-2026-53587)
Description
A vulnerability in libgit2 affecting certain Ubuntu LTS releases allows a remote attacker to cause a denial of service. The issue involves incorrect handling of certain capability buffers in the Git Smart Protocol. This vulnerability has a CVSS 3.1 base score of 7.5, indicating a medium severity level. Multiple Ubuntu LTS versions are affected, and patches are available to remediate the issue.
CVSS v3.1
Score 7.5high
Affected software
pkg:deb/ubuntu/libgit2?arch=source&distro=noblepkg:deb/ubuntu/libgit2?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-2026-53587 is a vulnerability in libgit2 where the software incorrectly handles certain capability buffers in the Git Smart Protocol. This flaw could be exploited by a remote attacker to cause a denial of service condition. The vulnerability affects multiple Ubuntu LTS releases, including 24.04 and 26.04. The CVSS 3.1 vector indicates the attack requires no privileges or user interaction and can be exploited remotely over the network. A patch is available from Ubuntu as detailed in security notice USN-8628-1.
Potential Impact
The vulnerability allows a remote attacker to cause denial of service on affected systems running vulnerable versions of libgit2. There is no confirmed impact on confidentiality or integrity. No known exploits are currently reported in the wild.
Mitigation Recommendations
A fix is available and should be applied by updating libgit2 to the patched versions provided by Ubuntu. The vendor advisory (USN-8628-1) recommends performing a standard system update to obtain the necessary security patches. Systems using Ubuntu Pro can apply fixes via Extended Security Maintenance (ESM) where applicable.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-53587
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Patch Information
Threat ID: 6a8c4c56acd9273b499beb8c
Added to database: 08/24/2026, 13:51:18 UTC
Last enriched: 08/24/2026, 14:08:39 UTC
Last updated: 08/24/2026, 22:52:12 UTC
Views: 2
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