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CVE-2019-18198 Details

Description

In the Linux kernel before 5.3.4, a reference count usage error in the fib6_rule_suppress() function in the fib6 suppression feature of net/ipv6/fib6_rules.c, when handling the FIB_LOOKUP_NOREF flag, can be exploited by a local attacker to corrupt memory, aka CID-ca7a03c41753.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4	CVE	Release NotesVendor Advisory
https://github.com/torvalds/linux/commit/ca7a03c4175366a92cee0ccc4fec0038c3266e26	CVE	PatchThird Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca7a03c4175366a92cee0ccc4fec0038c3266e26	CVE	PatchVendor Advisory
https://launchpad.net/bugs/1847478	CVE	ExploitIssue TrackingThird Party Advisory
https://security.netapp.com/advisory/ntap-20191031-0005/	CVE	Third Party Advisory
https://usn.ubuntu.com/4161-1/	CVE	Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4	[email protected]	Release NotesVendor Advisory
https://github.com/torvalds/linux/commit/ca7a03c4175366a92cee0ccc4fec0038c3266e26	[email protected]	PatchThird Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca7a03c4175366a92cee0ccc4fec0038c3266e26	[email protected]	PatchVendor Advisory
https://launchpad.net/bugs/1847478	[email protected]	ExploitIssue TrackingThird Party Advisory
https://security.netapp.com/advisory/ntap-20191031-0005/	[email protected]	Third Party Advisory
https://usn.ubuntu.com/4161-1/	[email protected]	Third Party Advisory

see all 12 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-772	Missing Release of Resource after Effective Lifetime	[email protected]

Affected Products

Product	Versions
linux linux kernel	>= 5.3, < 5.3.4
CPE cpe:2.3:o:linux:linux_kernel:::::::: Remediation No remediation found in references.
canonical ubuntu linux	19.10
CPE cpe:2.3:o:canonical:ubuntu_linux:19.10:::::::* Remediation No remediation found in references.

Change History

7 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jan 20, 2023	Modified Analysis	[email protected]
Oct 31, 2019	CVE Modified	[email protected]
Oct 24, 2019	Initial Analysis	[email protected]
Oct 21, 2019	CVE Modified	[email protected]