CVE-2015-7550 Race condition in n/a

What is CVE-2015-7550?

CVE-2015-7550 is a medium-severity vulnerability in Linux kernel, published on 8 Feb 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.

Weakness: CWE-362

Which versions are affected by CVE-2015-7550?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2015-7550?

Apply the vendor's patch.

Is CVE-2015-7550 being exploited?

There is no known exploitation of CVE-2015-7550 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-2015-7550, GHSA-64vj-h4p8-j9qc, UBUNTU-CVE-2015-7550.