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QSN-8651-1: curl vulnerability

August 19, 2026

Summary

curl could be made to expose sensitive information over the network.

Details

It was discovered that curl incorrectly handled reusing connections when the origin changed between transfers. A remote attacker could possibly use this issue to obtain sensitive information.

Affected QuantaStor releases

ReleasePlatformPackageExposureShipped versionFixed versionStatus
6.9.1.001Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.307.81.0-1ubuntu1.26Fixed in this release
6.9.1.001Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.307.81.0-1ubuntu1.26Fixed in this release
6.9.1.001Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.307.81.0-1ubuntu1.26Fixed in this release
6.9.0.464Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.307.81.0-1ubuntu1.26Fixed in this release
6.9.0.464Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.307.81.0-1ubuntu1.26Fixed in this release
6.9.0.464Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.307.81.0-1ubuntu1.26Fixed in this release
6.8.6.015Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.277.81.0-1ubuntu1.26Fixed in this release
6.8.6.015Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.277.81.0-1ubuntu1.26Fixed in this release
6.8.6.015Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.277.81.0-1ubuntu1.26Fixed in this release
6.8.5.018Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTScurlInternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSlibcurl3-gnutlsExternally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSlibcurl4Internally-facing7.81.0-1ubuntu1.257.81.0-1ubuntu1.26Fixed by QuantaStor security update

Internally-facing: only accessible when logged into the QuantaStor console/ssh as the qadmin administrative sudo user; generally lower priority. Externally-facing: part of a service the storage platform presents on the network (or the kernel), so potentially reachable over the network.

CVEs

CVE-2026-11856

References

https://ubuntu.com/security/notices/USN-8651-1

https://nvd.nist.gov/vuln/detail/CVE-2026-11856

Update

Fixes marked Fixed by QuantaStor security update are applied by upgrading QuantaStor with security patches included (Upgrade Manager). Fixed package versions:

PlatformPackageVersion
bioniccurl7.58.0-2ubuntu3.24+esm11
Ubuntu 20.04 LTScurl7.68.0-1ubuntu2.25+esm6
Ubuntu 22.04 LTScurl7.81.0-1ubuntu1.26
Ubuntu 24.04 LTScurl8.5.0-2ubuntu10.12
resolutecurl8.18.0-1ubuntu2.4
trustycurl7.35.0-1ubuntu2.20+esm22
xenialcurl7.47.0-1ubuntu2.19+esm18