CVE-2019-20422
MEDIUM
5.5
CVSS Score
Published: January 27, 2020 at 04:21 AM UTC
Updated: June 17, 2026 at 02:30 AM UTC
1 product affected across 1 vendorLinux Kernel
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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 5.3.4
Affected range stops below 5.3.4, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
x_refsource_MISCMailing ListVendor Advisory
Source: [email protected]
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/torvalds/linux/commit/7b09c2d052db4b4ad0b27b97918b46a7746966fax_refsource_CONFIRM
Source: [email protected]
https://security.netapp.com/advisory/ntap-20200313-0003/CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-755
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