CVE-2017-18255

Severity: high (CVSS 7.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-03-31 · updated 2026-06-17
Weakness: CWE-190

Description

The perf_cpu_time_max_percent_handler function in kernel/events/core.c in the Linux kernel before 4.11 allows local users to cause a denial of service (integer overflow) or possibly have unspecified other impact via a large value, as demonstrated by an incorrect sample-rate calculation.

Affected products

Linux kernel: before 4.11 — fixed in 4.11

How to fix

Upgrade to a fixed version: Linux kernel 4.11. Check the vendor advisory for mitigations.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1572e45a924f254d9570093abde46430c3172e3d
http://www.securityfocus.com/bid/103607
https://github.com/torvalds/linux/commit/1572e45a924f254d9570093abde46430c3172e3d
https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
https://usn.ubuntu.com/3696-1/
https://usn.ubuntu.com/3696-2/
https://usn.ubuntu.com/3754-1/
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1572e45a924f254d9570093abde46430c3172e3d
http://www.securityfocus.com/bid/103607
https://github.com/torvalds/linux/commit/1572e45a924f254d9570093abde46430c3172e3d
https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
https://usn.ubuntu.com/3696-1/

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