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CVE-2016-8646

20
FAUCET Score

CVE-2016-8646 is a denial-of-service vulnerability affecting the Linux kernel prior to version 4.3.6, specifically within the hash_accept function in crypto/algif_hash.c. This flaw allows a local attacker to trigger an OOPS (kernel panic) by attempting to use in-kernel hash algorithms on a socket that has not received any data. Rated Medium severity with a CVSS score of 5.5, it requires local access and has a high impact on availability. 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
<= 4.3.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
34.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 89th percentile among its peer group of 15,937 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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 (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-514.21.1.rt56.438.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-514.21.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-514.rt56.221.el6rt
View patch

Vendor Advisories (1)

redhatCVE-2016-8646Moderate

kernel: Oops in shash_async_export()

Nov 15, 2016

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Issue TrackingPatchVendor Advisory
access.redhat.com / errata/RHSA-2017:1297
access.redhat.com / errata/RHSA-2017:1298
access.redhat.com / errata/RHSA-2017:1308
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
github.com / torvalds/linux/commit/4afa5f9617927453ac04b24b584f6c718dfb4f45
Issue TrackingPatchThird Party Advisory
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.3.6
Release Notes
openwall.com / lists/oss-security/2016/11/15/2
Mailing ListThird Party Advisory
securityfocus.com / bid/94309