NULL Pointer Dereference Affecting linux-4.9 package, versions <4.9.144-3.1~deb8u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-DEBIAN8-LINUX49-340561
- published2 Dec 2018
- disclosed21 Nov 2018
Introduced: 21 Nov 2018
CVE-2018-19407 (opens in a new tab)How to fix?
Upgrade Debian:8 linux-4.9 to version 4.9.144-3.1~deb8u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-4.9 package and not the linux-4.9 package as distributed by Debian.
See How to fix? for Debian:8 relevant fixed versions and status.
The vcpu_scan_ioapic function in arch/x86/kvm/x86.c in the Linux kernel through 4.19.2 allows local users to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a situation where ioapic is uninitialized.
References
- https://security-tracker.debian.org/tracker/CVE-2018-19407
- https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
- https://lkml.org/lkml/2018/11/20/580
- http://www.securityfocus.com/bid/105987
- https://usn.ubuntu.com/3871-1/
- https://usn.ubuntu.com/3871-3/
- https://usn.ubuntu.com/3871-4/
- https://usn.ubuntu.com/3871-5/
- https://usn.ubuntu.com/3872-1/
- https://usn.ubuntu.com/3878-1/
- https://usn.ubuntu.com/3878-2/
- https://usn.ubuntu.com/3879-1/
- https://usn.ubuntu.com/3879-2/