CVE-2017-17807 Missing authorization in n/a

What is CVE-2017-17807?

CVE-2017-17807 is a low-severity missing authorization vulnerability in Linux kernel, published on 20 Dec 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to the current task's "default request-key keyring" via the request_key() system call, allowing a local user to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write permission) to that keyring, related to construct_get_dest_keyring() in security/keys/request_key.c.

Weakness: CWE-862

Which versions are affected by CVE-2017-17807?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2017-17807?

Apply the vendor's patch.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2017-17807 being exploited?

There is no known exploitation of CVE-2017-17807 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-17807, GHSA-vfg5-pf24-9v2v, UBUNTU-CVE-2017-17807.