Medium severity5.5NVD Advisory· Published Jan 27, 2020· Updated Jun 17, 2026
CVE-2019-20422
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.
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Affected products
2- Linux/Linux kerneldescription
Patches
Vulnerability mechanics
References
3- 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
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