CVE-2018-16880
A malicious virtual guest, under specific conditions, can trigger an out-of-bounds write in a kmalloc-8 slab on a virtual host which may lead to a kernel memory corruption and a system panic.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.56%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A flaw was found in the Linux kernel's handle_rx() function in the [vhost_net] driver. A malicious virtual guest, under specific conditions, can trigger an out-of-bounds write in a kmalloc-8 slab on a virtual host which may lead to a kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out. Versions from v4.16 and newer are vulnerable.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.56% probability · 45th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel · canonical/ubuntu linux
- Source
- secalert@redhat.com
References
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00037.htmlMailing List, Third Party Advisory
- http://www.securityfocus.com/bid/106735Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16880Issue Tracking, Patch, Third Party Advisory
- https://support.f5.com/csp/article/K03593314Third Party Advisory
- https://usn.ubuntu.com/3903-1/Third Party Advisory
- https://usn.ubuntu.com/3903-2/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00037.htmlMailing List, Third Party Advisory
- http://www.securityfocus.com/bid/106735Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16880Issue Tracking, Patch, Third Party Advisory
- https://support.f5.com/csp/article/K03593314Third Party Advisory
- https://usn.ubuntu.com/3903-1/Third Party Advisory
- https://usn.ubuntu.com/3903-2/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.