What’s Vulnerable › Vulnerabilities

CVE-2018-20855

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-26 · updated 2026-06-17
• Weakness: CWE-119

Description

An issue was discovered in the Linux kernel before 4.18.7. In create_qp_common in drivers/infiniband/hw/mlx5/qp.c, mlx5_ib_create_qp_resp was never initialized, resulting in a leak of stack memory to userspace.

Affected products

• Linux kernel: before 4.18.7 — fixed in 4.18.7
• NetApp Active Iq Performance Analytics Services: all versions
• Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: from 9.5
• NetApp Data Availability Services: all versions
• NetApp Element Software: all versions
• openSUSE Leap: 15.0, 15.1

How to fix

Upgrade to a fixed version: Linux kernel 4.18.7. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00055.html
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00056.html
• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.7
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0625b4ba1a5d4703c7fb01c497bd6c156908af00
• https://github.com/torvalds/linux/commit/0625b4ba1a5d4703c7fb01c497bd6c156908af00
• https://security.netapp.com/advisory/ntap-20190905-0002/
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00055.html
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00056.html
• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.7
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0625b4ba1a5d4703c7fb01c497bd6c156908af00
• https://github.com/torvalds/linux/commit/0625b4ba1a5d4703c7fb01c497bd6c156908af00
• https://security.netapp.com/advisory/ntap-20190905-0002/

Get alerted when CVE-2018-20855 or the next vulnerability affects your stack