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CVE-2015-8461

20
FAUCET Score

CVE-2015-8461 describes a race condition in ISC BIND versions 9.9.8 before 9.9.8-P2 and 9.10.3 before 9.10.3-P2, specifically within the resolver.c component. This vulnerability allows remote attackers to trigger a denial of service by causing an INSIST assertion failure and daemon exit. With a CVSS score of 7.1, it is considered high severity, requiring medium attack complexity but no authentication, leading to a complete loss of availability. There is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB, though it has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
8.4.7CPE matchmatch criteria
cpe:2.3:a:isc:bind:8.4.7:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.0:*:*:*:*:*:*:*
9.0.1CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.0.1:*:*:*:*:*:*:*
9.1CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.1:*:*:*:*:*:*:*
9.1.1CPE matchmatch criteria
cpe:2.3:a:isc:bind:9.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.1HIGH

AV:N/AC:M/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.85%
Probability of exploitation in next 30 days
EPSS Percentile
91.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0485 is in the 58th percentile among its peer group of 8,918 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

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

Remediation

Vendor Advisories (1)

redhatCVE-2015-8461Moderate

bind: race condition when handling socket errors can lead to an assertion failure in resolver.c

Dec 15, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-December/174145.html
lists.fedoraproject.org / pipermail/package-announce/2015-December/174252.html
kb.isc.org / article/AA-01319
Vendor Advisory
kb.isc.org / article/AA-01380
kb.isc.org / article/AA-01438
securityfocus.com / bid/79347
securitytracker.com / id/1034419
slackware.com / security/viewer.php