CVE-2019-20422 - Improper Handling of Exceptional Conditions

Severity

55%

Complexity

18%

Confidentiality

60%

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.

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.

CVSS 3.1 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:P).

Overview

First reported 5 years ago

2020-01-27 05:15:00

Last updated 4 years ago

2020-03-13 10:15:00

Affected Software

Linux Kernel

References

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4

Mailing List, Vendor Advisory

https://github.com/torvalds/linux/commit/7b09c2d052db4b4ad0b27b97918b46a7746966fa

Patch, Third Party Advisory

https://security.netapp.com/advisory/ntap-20200313-0003/

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