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CVE-2017-17806

Published: Dec 20, 2017Updated: May 13, 2026 Sources: CVE List NVDCWE-787
NVD MITRE
7.8CVSSHIGH
EPSS Score
0.6%
Top 58.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing SHA-3 initialization.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

linux kernellinux
On-premOS
Operating Systems
debian linuxdebian
On-premOS
Operating Systems / linux-distro
leapopensuse
On-premOS
Operating Systems / linux-distro
leapopensuse project
On-premOS
Operating Systems / linux-distro
linux enterprise desktopsuse
On-premOS
Operating Systems / linux-distro
linuxoss-projectOperating Systemsaka the linux kernel
debianoss-projectGBOperating Systemsaka debian gnu/linux
opensuseoss-projectDEOperating Systemsaka opensuse
opensuse projectoss-projectDEOperating Systemsaka opensuse, opensuse
susecommercialDEOperating Systems
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1
git.kernel.org
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
lists.opensuse.org
and 18 more references View all →

Timeline

Published
Dec 20, 2017
Last Updated
May 13, 2026

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