What’s Vulnerable › Vulnerabilities

CVE-2019-18680

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-11-04 · updated 2026-06-17
• Weakness: CWE-476

Description

An issue was discovered in the Linux kernel 4.4.x before 4.4.195. There is a NULL pointer dereference in rds_tcp_kill_sock() in net/rds/tcp.c that will cause denial of service, aka CID-91573ae4aed0.

Affected products

• Linux kernel: from 4.4.179 before 4.4.195 — fixed in 4.4.195

How to fix

Upgrade to a fixed version: Linux kernel 4.4.195. Check the vendor advisory for mitigations.

References

• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.195
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=91573ae4aed0a49660abdad4d42f2a0db995ee5e
• https://github.com/torvalds/linux/commit/91573ae4aed0a49660abdad4d42f2a0db995ee5e
• https://lkml.org/lkml/2019/9/18/337
• https://security.netapp.com/advisory/ntap-20191205-0001/
• https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.195
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=91573ae4aed0a49660abdad4d42f2a0db995ee5e
• https://github.com/torvalds/linux/commit/91573ae4aed0a49660abdad4d42f2a0db995ee5e
• https://lkml.org/lkml/2019/9/18/337
• https://security.netapp.com/advisory/ntap-20191205-0001/

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