What is CVE-2019-20422?

CVE-2019-20422 is a medium-severity vulnerability in Linux Kernel, classified under Improper Handling of Exceptional Conditions. CVSS score: 5.5/10. Published 2020-01-27.

How severe is CVE-2019-20422?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Linux Kernel

CVE-2019-20422

In the Linux kernel before 5.3.4, fib6_rule_lookup in net/ipv6/ip6_fib.c mishandles the RT6_LOOKUP_F_DST_NOREF flag in a reference-count decision, leading to (for example) a crash that was identified by syzkaller, aka CID-7b09c2d052db.

EPSS: 0.004 (35.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux Linux_kernel
N/a — versions n/a

Weakness classification (CWE)

CWE-755 — Improper Handling of Exceptional Conditions

References

cve@mitre.org (Mailing List, x_refsource_MISC, Vendor Advisory)
cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2019-20422?: CVE-2019-20422 is a medium-severity vulnerability in Linux Kernel, classified under Improper Handling of Exceptional Conditions. CVSS score: 5.5/10. Published 2020-01-27.
How severe is CVE-2019-20422?: Medium severity. CVSS v3 base score is 5.5 out of 10.