What’s Vulnerable › Vulnerabilities

CVE-2018-11508

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-05-28 · updated 2026-06-17
• Weakness: CWE-200

Description

The compat_get_timex function in kernel/compat.c in the Linux kernel before 4.16.9 allows local users to obtain sensitive information from kernel memory via adjtimex.

Affected products

• Canonical Ubuntu Linux: 16.04, 17.10, 18.04
• Linux kernel: before 4.16.9 — fixed in 4.16.9

How to fix

Upgrade to a fixed version: Linux kernel 4.16.9. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a0b98734479aa5b3c671d5190e86273372cab95
• http://www.securityfocus.com/bid/104292
• https://bugs.chromium.org/p/project-zero/issues/detail?id=1574
• https://github.com/torvalds/linux/commit/0a0b98734479aa5b3c671d5190e86273372cab95
• https://usn.ubuntu.com/3695-1/
• https://usn.ubuntu.com/3695-2/
• https://usn.ubuntu.com/3697-1/
• https://usn.ubuntu.com/3697-2/
• https://www.exploit-db.com/exploits/46208/
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.16.9
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a0b98734479aa5b3c671d5190e86273372cab95
• http://www.securityfocus.com/bid/104292

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