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QSN-8736-1: Perl vulnerabilities

September 8, 2026

Summary

Several security issues were fixed in Perl.

Details

It was discovered that Perl incorrectly handled certain large inputs during regular expression matching. An attacker could possibly use this issue to trigger out-of-bounds heap reads or writes, resulting in a denial of service or arbitrary code execution. (CVE-2026-15534)

It was discovered that Perl incorrectly handled certain regular expression containing alternative matching branches. An attacker could possibly use this issue to cause incorrect regular expression matches, resulting in security restrictions being bypassed. (CVE-2026-19487)

Affected QuantaStor releases

ReleasePlatformPackageExposureShipped versionFixed versionStatus
6.9.1.001Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.9.1.001Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.9.1.001Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.9.1.001Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.9.0.464Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.9.0.464Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.9.0.464Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.9.0.464Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.8.6.015Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.8.6.015Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.8.6.015Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.8.6.015Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.95.34.0-3ubuntu1.9Fixed in this release
6.8.5.018Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.5.018Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.4.038Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.3.018Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.2.002Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.1.007Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSlibperl5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSperlInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSperl-baseInternally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed by QuantaStor security update
6.8.0.205Ubuntu 22.04 LTSperl-modules-5.34Internally-facing5.34.0-3ubuntu1.75.34.0-3ubuntu1.9Fixed 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-2026-19487, CVE-2026-15534

References

https://ubuntu.com/security/notices/USN-8736-1

https://nvd.nist.gov/vuln/detail/CVE-2026-19487

https://nvd.nist.gov/vuln/detail/CVE-2026-15534

Update

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

PlatformPackageVersion
bionicperl5.26.1-6ubuntu0.7+esm4
Ubuntu 20.04 LTSperl5.30.0-9ubuntu0.5+esm4
Ubuntu 22.04 LTSperl5.34.0-3ubuntu1.9
resoluteperl5.40.1-7ubuntu0.2
trustyperl5.18.2-2ubuntu1.7+esm9
xenialperl5.22.1-9ubuntu0.9+esm4