Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.3, < 5.3.4 |
| Canonical | Ubuntu Linux | 19.10 |
Related Weaknesses (CWE)
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4Release NotesVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca7a0PatchVendor Advisory
- https://github.com/torvalds/linux/commit/ca7a03c4175366a92cee0ccc4fec0038c3266e2PatchThird Party Advisory
- https://launchpad.net/bugs/1847478ExploitIssue TrackingThird Party Advisory
- https://security.netapp.com/advisory/ntap-20191031-0005/Third Party Advisory
- https://usn.ubuntu.com/4161-1/Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4Release NotesVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca7a0PatchVendor Advisory
- https://github.com/torvalds/linux/commit/ca7a03c4175366a92cee0ccc4fec0038c3266e2PatchThird Party Advisory
- https://launchpad.net/bugs/1847478ExploitIssue TrackingThird Party Advisory
- https://security.netapp.com/advisory/ntap-20191031-0005/Third Party Advisory
- https://usn.ubuntu.com/4161-1/Third Party Advisory
FAQ
What is CVE-2019-18198?
CVE-2019-18198 is a vulnerability with a CVSS score of 7.8 (HIGH). 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, ...
How severe is CVE-2019-18198?
CVE-2019-18198 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-18198?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Canonical Ubuntu Linux.