What’s Vulnerable › Vulnerabilities

CVE-2017-18270

• Severity: high (CVSS 7.1 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: 2018-05-18 · updated 2026-06-17

Description

In the Linux kernel before 4.13.5, a local user could create keyrings for other users via keyctl commands, setting unwanted defaults or causing a denial of service.

Affected products

• Linux kernel: before 4.13.5 — fixed in 4.13.5

How to fix

Upgrade to a fixed version: Linux kernel 4.13.5. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3
• http://www.securityfocus.com/bid/104254
• https://bugzilla.redhat.com/show_bug.cgi?id=1580979
• https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c11
• https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c9
• https://github.com/torvalds/linux/commit/237bbd29f7a049d310d907f4b2716a7feef9abf3
• https://support.f5.com/csp/article/K37301725
• https://usn.ubuntu.com/3754-1/
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3
• http://www.securityfocus.com/bid/104254
• https://bugzilla.redhat.com/show_bug.cgi?id=1580979

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