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CVE-2018-12896 PUBLISHED

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.

EPSS 0.03% · 9.4th percentile

Risk Scores

EPSS Score
0.03%
9.4th percentile

Affected Products

VendorProductVersions
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.110, *, 6.11.0-1016.17~24.04.1
Ubuntu:24.04:LTSlinux-azure-6.116.11.0-1012.12~24.04.1, *, *
Ubuntu:14.04:LTSlinux3.13.0-7.26, 3.13.0-8.27, 3.13.0-8.28
Ubuntu:16.04:LTSlinux-aws4.4.0-1004.13, 4.4.0-1011.20, 4.4.0-1009.18
Ubuntu:22.04:LTSlinux-realtime0, 5.15.0-1032.35
Ubuntu:16.04:LTSlinux-kvm4.4.0-1027.32, 0, 4.4.0-1004.9
Ubuntu:16.04:LTSlinux4.4.0-22.39, 4.4.0-66.87, 4.4.0-67.88
Ubuntu:18.04:LTSlinux-raspi24.15.0-1010.11, 4.15.0-1017.18, 4.15.0-1029.31
Ubuntu:22.04:LTSlinux-intel-iot-realtime5.15.0-1073.75, 0
Ubuntu:20.04:LTSlinux-raspi25.3.0-1007.8, 5.3.0-1014.16, 5.3.0-1015.17
Ubuntu:18.04:LTSlinux-gcp4.15.0-1015.15, 4.15.0-1001.1, 4.15.0-1003.3
Ubuntu:24.04:LTSlinux-gcp-6.116.11.0-1017.17~24.04.1, 6.11.0-1014.14~24.04.1, 6.11.0-1011.11~24.04.1
Ubuntu:14.04:LTSlinux-lts-xenial*, *, *
Ubuntu:Pro:20.04:LTSlinux-azure-fde-5.155.15.0-1035.42~20.04.1.1, 0, 5.15.0-1019.24~20.04.1.1
Ubuntu:24.04:LTSlinux-raspi-realtime0, 6.8.0-2019.20
Ubuntu:20.04:LTSlinux-gke5.4.0-1059.62, 5.4.0-1056.59, 0
Ubuntu:16.04:LTSlinux-snapdragon4.4.0-1104.109, 4.4.0-1069.74, 0
Ubuntu:20.04:LTSlinux-azure-fde5.4.0-1098.104+cvm1.1, 5.4.0-1092.97+cvm1.1, 5.4.0-1090.95+cvm1.1
Ubuntu:14.04:LTSlinux-aws4.4.0-1012.12, 4.4.0-1019.19, 4.4.0-1009.9
Ubuntu:20.04:LTSlinux-riscv5.4.0-39.44, 5.4.0-36.41, 5.4.0-40.45

…and 13 more

Timeline

References

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