CVE - CVE-2018-12896

CVE-ID
CVE-2018-12896	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://bugzilla.kernel.org/show_bug.cgi?id=200189 MISC:https://github.com/lcytxw/bug_repro/tree/master/bug_200189 MISC:https://github.com/torvalds/linux/commit/78c9c4dfbf8c04883941445a195276bb4bb92c76 MLIST:[debian-lts-announce] 20190315 [SECURITY] [DLA 1715-1] linux-4.9 security update URL:https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html MLIST:[debian-lts-announce] 20190327 [SECURITY] [DLA 1731-1] linux security update URL:https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html MLIST:[debian-lts-announce] 20190401 [SECURITY] [DLA 1731-2] linux regression update URL:https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html UBUNTU:USN-3847-1 URL:https://usn.ubuntu.com/3847-1/ UBUNTU:USN-3847-2 URL:https://usn.ubuntu.com/3847-2/ UBUNTU:USN-3847-3 URL:https://usn.ubuntu.com/3847-3/ UBUNTU:USN-3848-1 URL:https://usn.ubuntu.com/3848-1/ UBUNTU:USN-3848-2 URL:https://usn.ubuntu.com/3848-2/ UBUNTU:USN-3849-1 URL:https://usn.ubuntu.com/3849-1/ UBUNTU:USN-3849-2 URL:https://usn.ubuntu.com/3849-2/
Assigning CNA
MITRE Corporation
Date Record Created
20180626	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20180626)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)