What is CVE-2015-7550?

CVE-2015-7550 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2015-7550 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2015-7550?

CVE-2015-7550 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2015-7550?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2015-7550 patch availability.

Is CVE-2015-7550 actively exploited?

CVE-2015-7550 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2015-7550

Medium

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.

Package Linux Kernel

Published 2016-02-08

Last modified 2026-05-06

CVSS version 3.0

Patch available

Awaiting data

CVSS 3.0 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-362

CVE-2015-7550 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

16 total

Kernel Git
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d

Vendor Advisory
Kernel.org
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4

Vendor Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
Lists
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html

Showing 5 of 16 references View all on NVD

Details

CVE ID CVE-2015-7550

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.0

Published 2016-02-08

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2015-7550?

CVE-2015-7550 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2015-7550 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2015-7550?

CVE-2015-7550 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2015-7550?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2015-7550 patch availability.
Is CVE-2015-7550 actively exploited?

No. CVE-2015-7550 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.