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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 20%
VendorProductVersion
linuxlinux_kernel
𝑥
< 5.3.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
5.10.223-1
fixed
bullseye (security)
5.10.226-1
fixed
bookworm
6.1.106-3
fixed
bookworm (security)
6.1.112-1
fixed
trixie
6.11.5-1
fixed
sid
6.11.6-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
linux
eoan
Fixed 5.3.0-22.24
released
bionic
not-affected
xenial
not-affected
trusty
not-affected
linux-aws
eoan
Fixed 5.3.0-1007.8
released
bionic
not-affected
xenial
not-affected
trusty
not-affected
linux-aws-5.0
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-aws-hwe
eoan
dne
bionic
dne
xenial
not-affected
trusty
dne
linux-azure
eoan
Fixed 5.3.0-1007.8
released
bionic
not-affected
xenial
not-affected
trusty
not-affected
linux-azure-5.3
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-azure-edge
eoan
dne
bionic
ignored
xenial
ignored
trusty
dne
linux-gcp
eoan
Fixed 5.3.0-1008.9
released
bionic
not-affected
xenial
not-affected
trusty
dne
linux-gcp-5.3
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gcp-edge
eoan
dne
bionic
ignored
xenial
dne
trusty
dne
linux-gke-4.15
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gke-5.0
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-gke-5.3
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-hwe
eoan
dne
bionic
not-affected
xenial
not-affected
trusty
dne
linux-hwe-edge
eoan
dne
bionic
ignored
xenial
ignored
trusty
dne
linux-kvm
eoan
Fixed 5.3.0-1007.8
released
bionic
not-affected
xenial
not-affected
trusty
dne
linux-lts-trusty
eoan
dne
bionic
dne
xenial
dne
trusty
dne
linux-lts-xenial
eoan
dne
bionic
dne
xenial
dne
trusty
not-affected
linux-oem
eoan
not-affected
bionic
not-affected
xenial
ignored
trusty
dne
linux-oem-5.4
eoan
dne
bionic
dne
xenial
dne
trusty
dne
linux-oem-osp1
eoan
not-affected
bionic
not-affected
xenial
dne
trusty
dne
linux-oracle
eoan
Fixed 5.3.0-1006.7
released
bionic
not-affected
xenial
not-affected
trusty
dne
linux-oracle-5.0
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-raspi2
eoan
Fixed 5.3.0-1012.14
released
bionic
not-affected
xenial
not-affected
trusty
dne
linux-raspi2-5.3
eoan
dne
bionic
not-affected
xenial
dne
trusty
dne
linux-snapdragon
eoan
dne
bionic
not-affected
xenial
not-affected
trusty
dne
Common Weakness Enumeration
References
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4
https://github.com/torvalds/linux/commit/7b09c2d052db4b4ad0b27b97918b46a7746966fa
https://security.netapp.com/advisory/ntap-20200313-0003/
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4
https://github.com/torvalds/linux/commit/7b09c2d052db4b4ad0b27b97918b46a7746966fa
https://security.netapp.com/advisory/ntap-20200313-0003/