Medium severity5.5NVD Advisory· Published Jan 27, 2020· Updated Jun 17, 2026

CVE-2019-20422

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Linux/Kernelllm-fuzzy2 versions
<5.3.4+ 1 more
- (no CPE)range: <5.3.4
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: <5.3.4
Linux/Linux kerneldescription

Patches

Vulnerability mechanics

References

github.com/torvalds/linux/commit/7b09c2d052db4b4ad0b27b97918b46a7746966fanvdPatchThird Party Advisory
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4nvdMailing ListVendor Advisory
security.netapp.com/advisory/ntap-20200313-0003/nvd

News mentions

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cvss	0.358
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000