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CVE-2017-17805

25
FAUCET Score

CVE-2017-17805 describes a denial-of-service vulnerability in the Salsa20 encryption algorithm within the Linux kernel versions prior to 4.14.8, affecting various distributions including Debian, SUSE, and Ubuntu. The flaw stems from incorrect handling of zero-length inputs when using the AF_ALG-based skcipher interface, allowing a local attacker to trigger a kernel crash. With a CVSS score of 7.8 (High), this vulnerability has a local attack vector with low complexity, potentially leading to high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.6.25, < 3.2.97CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.3, < 3.16.52CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.17, < 3.18.89CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.19, < 4.1.49CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.2, < 4.4.107CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
35.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 75th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 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 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-754.18.2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-957.rt56.910.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.el7a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-957.el7
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel

Vendor Advisories (1)

redhatCVE-2017-17805Moderate

kernel: Salsa20 encryption algorithm does not correctly handle zero-length inputs allowing local attackers to cause denial-of-service

Nov 29, 2017

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Patch
lists.opensuse.org / opensuse-security-announce/2018-01/msg00006.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2018-01/msg00007.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2018-01/msg00008.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2018-01/msg00014.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2018-01/msg00016.html
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2948
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3083
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3096
Third Party Advisory
access.redhat.com / errata/RHSA-2019:2473
Third Party Advisory
github.com / torvalds/linux/commit/ecaaab5649781c5a0effdaf298a925063020500e
Patch
lists.debian.org / debian-lts-announce/2018/01/msg00004.html
Third Party Advisory
usn.ubuntu.com / 3617-1
Third Party Advisory
usn.ubuntu.com / 3617-2
Third Party Advisory
usn.ubuntu.com / 3617-3
Third Party Advisory
usn.ubuntu.com / 3619-1
Third Party Advisory
usn.ubuntu.com / 3619-2
Third Party Advisory
usn.ubuntu.com / 3620-1
Third Party Advisory
usn.ubuntu.com / 3620-2
Third Party Advisory
usn.ubuntu.com / 3632-1
Third Party Advisory
debian.org / security/2017/dsa-4073
Third Party Advisory
debian.org / security/2018/dsa-4082
Third Party Advisory
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.14.8
Issue TrackingRelease Notes
securityfocus.com / bid/102291
Third Party AdvisoryVDB Entry