What’s Vulnerable › Vulnerabilities

CVE-2017-18216

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-03-05 · updated 2026-06-17
• Weakness: CWE-476

Description

In fs/ocfs2/cluster/nodemanager.c in the Linux kernel before 4.15, local users can cause a denial of service (NULL pointer dereference and BUG) because a required mutex is not used.

Affected products

• Linux kernel: before 4.15 — fixed in 4.15

How to fix

Upgrade to a fixed version: Linux kernel 4.15. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=853bc26a7ea39e354b9f8889ae7ad1492ffa28d2
• http://www.securityfocus.com/bid/103278
• https://github.com/torvalds/linux/commit/853bc26a7ea39e354b9f8889ae7ad1492ffa28d2
• https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
• https://usn.ubuntu.com/3776-1/
• https://usn.ubuntu.com/3776-2/
• https://usn.ubuntu.com/3798-1/
• https://usn.ubuntu.com/3798-2/
• https://www.debian.org/security/2018/dsa-4187
• https://www.debian.org/security/2018/dsa-4188
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=853bc26a7ea39e354b9f8889ae7ad1492ffa28d2
• http://www.securityfocus.com/bid/103278

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