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QSN-8639-1: libpng vulnerabilities

August 17, 2026

Summary

Several security issues were fixed in libpng.

Details

Patrick Keshishian discovered that libpng incorrectly handled certain text chunks. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-10087)

It was discovered that libpng incorrectly handled certain malformed images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-14048)

It was discovered that libpng incorrectly handled memory when freeing certain images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2019-7317)

It was discovered that libpng incorrectly handled memory when processing certain images. An attacker could possibly use this issue to cause a denial of service, or execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-33416)

It was discovered that libpng incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-33636)

It was discovered that libpng incorrectly handled memory when processing certain images. An attacker could possibly use this issue to cause a denial of service or obtain sensitive information. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-34757)

Seung Min Shin discovered that libpng incorrectly handled certain animated images. An attacker could possibly use this issue to cause libpng to misinterpret image data. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2026-40930)

Affected QuantaStor releases

ReleasePlatformPackageExposureShipped versionFixed versionStatus
6.9.1.001Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed by QuantaStor security update
6.9.0.464Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed by QuantaStor security update
6.8.6.015Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSlibpng16-16Internally-facing1.6.37-3build51.6.37-3ubuntu0.6Fixed 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-2019-7317, CVE-2026-33416, CVE-2026-40930, CVE-2016-10087, CVE-2026-34757, CVE-2026-33636, CVE-2018-14048

References

https://ubuntu.com/security/notices/USN-8639-1

https://nvd.nist.gov/vuln/detail/CVE-2019-7317

https://nvd.nist.gov/vuln/detail/CVE-2026-33416

https://nvd.nist.gov/vuln/detail/CVE-2026-40930

https://nvd.nist.gov/vuln/detail/CVE-2016-10087

https://nvd.nist.gov/vuln/detail/CVE-2026-34757

https://nvd.nist.gov/vuln/detail/CVE-2026-33636

https://nvd.nist.gov/vuln/detail/CVE-2018-14048

Update

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

PlatformPackageVersion
bioniclibpng1.61.6.34-1ubuntu0.18.04.2+esm3
Ubuntu 20.04 LTSlibpng1.61.6.37-2ubuntu0.1~esm3
Ubuntu 22.04 LTSlibpng1.61.6.37-3ubuntu0.6
trustylibpng1.2.50-1ubuntu2.14.04.3+esm2
xeniallibpng1.2.54-1ubuntu1.1+esm3
xeniallibpng1.61.6.20-2ubuntu0.1~esm4