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QSN-8687-1: p11-kit vulnerabilities
August 27, 2026
Summary
p11-kit could be made to crash if it received specially crafted input.
Details
It was discovered that p11-kit incorrectly handled certain RPC messages. A local attacker could use this issue to cause p11-kit to crash, resulting in a denial of service. (CVE-2026-13757)
It was discovered that p11-kit incorrectly handled nested attribute decoding on 32-bit systems. A local attacker could use this issue to cause p11-kit to crash, resulting in a denial of service. (CVE-2026-18938)
Affected QuantaStor releases
| Release | Platform | Package | Exposure | Shipped version | Fixed version | Status |
|---|---|---|---|---|---|---|
| 6.9.1.001 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed by QuantaStor security update |
| 6.9.0.464 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed by QuantaStor security update |
| 6.8.6.015 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed by QuantaStor security update |
| 6.8.5.018 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed by QuantaStor security update |
| 6.8.4.038 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed by QuantaStor security update |
| 6.8.3.018 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed by QuantaStor security update |
| 6.8.2.002 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed by QuantaStor security update |
| 6.8.1.007 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed by QuantaStor security update |
| 6.8.0.205 | Ubuntu 22.04 LTS | libp11-kit0 | Externally-facing | 0.24.0-6build1 | 0.24.0-6ubuntu0.1 | Fixed 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-2026-18938, CVE-2026-13757
References
https://ubuntu.com/security/notices/USN-8687-1
https://nvd.nist.gov/vuln/detail/CVE-2026-18938
https://nvd.nist.gov/vuln/detail/CVE-2026-13757
Update
Fixes marked Fixed by QuantaStor security update are applied by upgrading QuantaStor with security patches included (Upgrade Manager). Fixed package versions:
| Platform | Package | Version |
|---|---|---|
| bionic | p11-kit | 0.23.9-2ubuntu0.1+esm1 |
| Ubuntu 20.04 LTS | p11-kit | 0.23.20-1ubuntu0.1+esm1 |
| Ubuntu 22.04 LTS | p11-kit | 0.24.0-6ubuntu0.1 |
| Ubuntu 24.04 LTS | p11-kit | 0.25.3-4ubuntu2.2 |