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CVE-2015-8983

21
FAUCET Score

CVE-2015-8983 is an integer overflow vulnerability in the GNU C Library (glibc) before version 2.22, specifically within the _IO_wstr_overflow function. This flaw allows remote attackers to trigger a heap-based buffer overflow, potentially leading to a denial of service or arbitrary code execution. With a CVSS score of 8.1 (High), it poses a significant risk due to its network-based attack vector and high impact on confidentiality, integrity, and availability, despite requiring high attack complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.21CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.87%
Probability of exploitation in next 30 days
EPSS Percentile
89.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0387 is in the 51st percentile among its peer group of 8,920 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: glibc
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: glibc
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: glibc

Vendor Advisories (1)

redhatCVE-2015-8983Moderate

glibc: _IO_wstr_overflow integer overflow

Feb 22, 2015

References

sourceware.org / bugzilla/show_bug.cgi
Issue TrackingPatch
sourceware.org / git/gitweb.cgi
sourceware.org / ml/libc-alpha/2015-08/msg00609.html
Third Party Advisory
openwall.com / lists/oss-security/2017/02/14/9
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/72740
Third Party AdvisoryVDB Entry