CVE-2015-7550

MEDIUM

Linux Kernel < 4.3.4 - Denial of Service via keyctl_read_key Race Condition

Title source: llm
STIX 2.1

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.

References (16)

Core 16
Core References
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2911-1
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2890-3
Issue Tracking x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1291197
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2911-2
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2890-2
Third Party Advisory x_refsource_confirm
https://security-tracker.debian.org/tracker/CVE-2015-7550
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2890-1
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2016/dsa-3434
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2888-1
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/79903

Scores

CVSS v3 5.5
EPSS 0.0041
EPSS Percentile 32.9%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-362
Status published
Products (1)
linux/linux_kernel < 4.3.3
Published Feb 08, 2016
Tracked Since Feb 18, 2026