Homepage

Integer Overflow or Wraparound Affecting linux-4.9 package, versions <4.9.144-3.1~deb8u1

Severity

 Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.04% (13th percentile)

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 applications
  • Snyk IDSNYK-DEBIAN8-LINUX49-340595
  • published11 Jul 2018
  • disclosed2 Jul 2018
Report a new vulnerability Found a mistake?

Introduced: 2 Jul 2018

CVE-2018-12896  (opens in a new tab)
CWE-190  (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.

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.