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CVE-2015-8921

29
FAUCET Score

CVE-2015-8921 describes an out-of-bounds read vulnerability in the ae_strtofflags function of libarchive versions prior to 3.2.0, affecting products from vendors such as Canonical and Novell. This flaw, triggered by a crafted mtree file, can lead to a denial of service. With a CVSS score of 7.5 (High), it is easily exploitable over the network without user interaction, though it only impacts availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
12.0CPE matchmatch criteria
cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:12.0:sp1:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:o:novell:suse_linux_enterprise_desktop:12.0:sp1:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:o:novell:suse_linux_enterprise_server:12.0:sp1:*:*:*:*:*:*
<= 3.1.901aCPE matchmatch criteria
cpe:2.3:a:libarchive:libarchive:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
11.99%
Probability of exploitation in next 30 days
EPSS Percentile
95.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.1199 is in the 93rd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libarchive-0:2.8.3-7.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libarchive-0:3.1.2-10.el7_2
View patch

Vendor Advisories (1)

redhatCVE-2015-8921Low

libarchive: Global out of bounds read in mtree parser

Jun 17, 2016

References

lists.opensuse.org / opensuse-security-announce/2016-07/msg00025.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-1844.html
rhn.redhat.com / errata/RHSA-2016-1850.html
blog.fuzzing-project.org / 47-Many-invalid-memory-access-issues-in-libarchive.html
Third Party Advisory
github.com / libarchive/libarchive/issues/512
security.gentoo.org / glsa/201701-03
debian.org / security/2016/dsa-3657
openwall.com / lists/oss-security/2016/06/17/2
Third Party Advisory
openwall.com / lists/oss-security/2016/06/17/5
Third Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinjul2016-3090544.html
securityfocus.com / bid/91307
ubuntu.com / usn/USN-3033-1
Third Party Advisory