DescriptionAn 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.
Overall state of this security issue: Analysis
This issue is currently rated as having low severity.
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
|SUSE Linux Enterprise Desktop 12 SP3||kernel-source||Analysis|
|SUSE Linux Enterprise Module for Basesystem 15 GA||kernel-source||Analysis|
|SUSE Linux Enterprise Module for Development Tools 15 GA||kernel-source||Analysis|
|SUSE Linux Enterprise Server 11 SP4||kernel-source||Analysis|
|SUSE Linux Enterprise Server 12 SP3||kernel-source||Analysis|