What is CVE-2015-8844?

CVE-2015-8844 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Improper Input Validation flaw (CWE-20). CVE-2015-8844 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2015-8844?

CVE-2015-8844 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:N/UI:R/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2015-8844?

No patch is currently available for CVE-2015-8844. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2015-8844 actively exploited?

CVE-2015-8844 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2015-8844

Medium

The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.

Package Linux Kernel

Published 2016-04-27

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

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-20

CVE-2015-8844 is a Improper Input Validation vulnerability

What is Improper Input Validation?

The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2015-8844 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
http://rhn.redhat.com/errata/RHSA-2016-2574.html
Red Hat
http://rhn.redhat.com/errata/RHSA-2016-2584.html
Kernel.org
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5
Openwall
http://www.openwall.com/lists/oss-security/2016/04/13/1
Securitytracker
http://www.securitytracker.com/id/1035594
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1326540
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d2b9d2a5ad5ef04ff978c9923d19730cb05efd55
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/d2b9d2a5ad5ef04ff978c9923d19730cb05efd55
Patch

Details

CVE ID CVE-2015-8844

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.0

Published 2016-04-27

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2015-8844?

CVE-2015-8844 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Input Validation flaw (CWE-20) . CVE-2015-8844 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2015-8844?

CVE-2015-8844 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:N/UI:R/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2015-8844?

No patch is currently available for CVE-2015-8844. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2015-8844 actively exploited?

No — CVE-2015-8844 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Improper Input Validation (CWE-20)?

The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. View CWE-20 on MITRE CWE →