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CVE-2015-8963

24
FAUCET Score

CVE-2015-8963 describes a race condition in the Linux kernel's event core, specifically affecting versions prior to 4.4, which could allow local users to achieve privilege escalation or a denial of service through a use-after-free vulnerability during CPU unplug operations. This high-severity vulnerability (CVSS 7.0) requires local access and high attack complexity, but could lead to significant impacts on confidentiality, integrity, and availability. Despite its potential impact, there is no known active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.2.85CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.3, < 3.16.40CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.17, < 3.18.54CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.19, < 4.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.0HIGH

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.43%
Probability of exploitation in next 30 days
EPSS Percentile
70.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0143 is in the 70th percentile among its peer group of 386 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.0 Bluesky, 0.1 Mastodon, and 0.0 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2015-8963Moderate

kernel: Race condition on CPU unplug leading to use-after-free

Jan 6, 2016

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchThird Party AdvisoryVendor Advisory
github.com / torvalds/linux/commit/12ca6ad2e3a896256f086497a7c7406a547ee373
PatchVendor Advisory
source.android.com / security/bulletin/2016-11-01.html
Third Party Advisory
securityfocus.com / bid/94207
Third Party AdvisoryVDB Entry