What’s Vulnerable › Vulnerabilities

CVE-2019-15921

• Severity: medium (CVSS 4.7 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: yes
• Published: 2019-09-04 · updated 2026-06-17
• Weakness: CWE-401

Description

An issue was discovered in the Linux kernel before 5.0.6. There is a memory leak issue when idr_alloc() fails in genl_register_family() in net/netlink/genetlink.c.

Affected products

• Linux kernel: before 5.0.6 — fixed in 5.0.6
• openSUSE Leap: 15.0, 15.1

How to fix

Upgrade to a fixed version: Linux kernel 5.0.6. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.6
• https://github.com/torvalds/linux/commit/ceabee6c59943bdd5e1da1a6a20dc7ee5f8113a2
• https://security.netapp.com/advisory/ntap-20191004-0001/
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
• http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.6
• https://github.com/torvalds/linux/commit/ceabee6c59943bdd5e1da1a6a20dc7ee5f8113a2
• https://security.netapp.com/advisory/ntap-20191004-0001/

Get alerted when CVE-2019-15921 or the next vulnerability affects your stack