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Vulnerability record · CVE-2018-20855 · published 26 July 2019

CVE-2018-20855: Linux kernel memory buffer overflow vulnerability

Linux · Linux Kernel

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.

3.3 CVSS 3.1 Low EPSS 0.47% · top 62.0% CWE-119 · Memory buffer overflow
3.3CVSS 3.1 base score, v2 2.1
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2018-20855), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.