NULL Pointer Dereference Affecting kernel package, versions <0:4.14.88-88.73.amzn2
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.
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- published27 Sept 2021
- disclosed21 Nov 2018
Introduced: 21 Nov 2018
CVE-2018-19407 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.88-88.73.amzn2 or higher.
This issue was patched in ALAS2-2018-1133.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 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
- http://www.securityfocus.com/bid/105987
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19407
- https://lkml.org/lkml/2018/11/20/580
- https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
- 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/