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CVE-2017-7645

27
FAUCET Score

CVE-2017-7645 describes a denial-of-service vulnerability in the NFSv2/NFSv3 server within the Linux kernel's nfsd subsystem, affecting various Linux distributions. Remote attackers can trigger a system crash by sending a specially crafted long RPC reply. This vulnerability has a CVSS score of 7.5 (High), indicating a critical impact with a network-based attack vector and low attack complexity, leading to high availability impact. Despite its severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.2.89CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.3, < 3.10.107CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.11, < 3.12.74CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.13, < 3.16.44CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.17, < 3.18.52CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
5.91%
Probability of exploitation in next 30 days
EPSS Percentile
92.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0590 is in the 87th 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 (6)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-696.28.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-514.26.1.rt56.442.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-514.26.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-514.rt56.228.el6rt
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2017-7645Important

kernel: nfsd: Incorrect handling of long RPC replies

Apr 14, 2017

References

access.redhat.com / errata/RHSA-2017:1615
Third Party Advisory
access.redhat.com / errata/RHSA-2017:1616
Third Party Advisory
access.redhat.com / errata/RHSA-2017:1647
Third Party Advisory
access.redhat.com / errata/RHSA-2018:1319
Third Party Advisory
github.com / torvalds/linux/commit/e6838a29ecb484c97e4efef9429643b9851fba6e
PatchThird Party Advisory
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
Vendor Advisory
help.ecostruxureit.com / display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
Third Party Advisory
marc.info
Mailing ListPatchThird Party Advisory
marc.info
Mailing ListPatchThird Party Advisory
usn.ubuntu.com / 3754-1
Third Party Advisory
debian.org / security/2017/dsa-3886
Third Party Advisory
securityfocus.com / bid/97950
Third Party AdvisoryVDB Entry