Improper Handling of Exceptional Conditions in Linux kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-20422 |
| CWE-ID | N/A |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system |
| Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Improper Handling of Exceptional Conditions
EUVDB-ID: #VU30426
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-20422
CWE-ID: N/A
Exploit availability: No
DescriptionThe vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
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.
MitigationInstall update from vendor's website.
Vulnerable software versionsLinux kernel: 5.3.1 - 5.3.3
External linkshttp://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4
http://github.com/torvalds/linux/commit/7b09c2d052db4b4ad0b27b97918b46a7746966fa
http://security.netapp.com/advisory/ntap-20200313-0003/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
