VYPR
Medium severity5.5NVD Advisory· Published Jul 2, 2018· Updated Jun 17, 2026

CVE-2018-12896

CVE-2018-12896

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.

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Affected products

120

Patches

Vulnerability mechanics

References

13

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