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Fencer Vulns
high 7.5

CVE-2017-8797 json

The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO…

published 2017-07-02 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-17740

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.5%
EPSS 9.5% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This type value is uninitialized upon encountering certain error conditions. This value is used as an array index for dereferencing, which leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system.

Patch / fix

  • linux linux_kernel 4.1.40, 4.4.70, 4.9.30, 4.11.3
  • linux Debian 14, Debian 13, Debian 12 4.9.30-1

debian advisories DEBIAN-CVE-2017-8797

  • linux Ubuntu 16.04 LTS 4.4.0-83.106
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1022.31
  • linux-gcp Ubuntu 16.04 LTS 4.13.0-1002.5
  • linux-hwe Ubuntu 16.04 LTS 4.13.0-32.35~16.04.1
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1061.69
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-83.106~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1063.68

ubuntu advisories UBUNTU-CVE-2017-8797

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
  • kernel-rt-trace enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
  • kernel-rt-vanilla enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
  • kernel-rt-firmware enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 1:3.10.0-693.2.1.rt56.585.el6rt
  • kernel-rt RHEL 7 EXTRAS_RT 3.10.0-693.rt56.617.el7
  • kernel-rt-kvm RHEL 7 EXTRAS_RT 3.10.0-693.rt56.617.el7
  • kernel-rt-trace RHEL 7 EXTRAS_RT 3.10.0-693.rt56.617.el7

red hat advisories RHSA-2017:2669RHSA-2017:2437RHSA-2017:2077RHSA-2017:1842

  • kgraft-patch-SLE12-SP2_Update_2 SLE Live Patching 12 7-2.1
  • kgraft-patch-SLE12-SP2_Update_1 SLE Live Patching 12 8-2.1
  • kgraft-patch-SLE12-SP2_Update_5 SLE Live Patching 12 5-2.1
  • kgraft-patch-SLE12-SP2_Update_4 SLE Live Patching 12 7-2.1
  • kgraft-patch-SLE12-SP2_Update_7 SLE Live Patching 12 3-2.1
  • kgraft-patch-SLE12-SP2_Update_6 SLE Live Patching 12 4-2.1
  • kgraft-patch-SLE12-SP2_Update_9 SLE Live Patching 12 2-2.1
  • kgraft-patch-SLE12-SP2_Update_0 SLE Live Patching 12 8-18.7.1

suse advisories SUSE-SU-2017:2068-1SUSE-SU-2017:2067-1SUSE-SU-2017:2063-1SUSE-SU-2017:2065-1SUSE-SU-2017:2064-1SUSE-SU-2017:2070-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-8797 updated cvss 8.6

kernel: NFSv4 server does not properly validate layout type when processing NFSv4 pNFS LAYOUTGET operand

  • Red Hat Enterprise Linux 7 perf, kernel, python-perf, kernel-kdump, kernel-tools, kernel-tools-libs, +2 more
    affected: no fix available
  • Red Hat Enterprise Linux Client (v. 7) perf 3.10.0-693.el7, kernel 3.10.0-693.el7, python-perf 3.10.0-693.el7, kernel-tools 3.10.0-693.el7, kernel-tools-libs 3.10.0-693.el7, kernel-abi-whitelists 3.10.0-693.el7, +1 more Red Hat Enterprise Linux Client Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-693.el7 Red Hat Enterprise Linux ComputeNode (v. 7) perf 3.10.0-693.el7, kernel 3.10.0-693.el7, python-perf 3.10.0-693.el7, kernel-tools 3.10.0-693.el7, kernel-tools-libs 3.10.0-693.el7, kernel-abi-whitelists 3.10.0-693.el7, +1 more
    fixed: vendor fix RHSA-2017:1842
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.3) perf 3.10.0-514.28.1.el7, kernel 3.10.0-514.28.1.el7, python-perf 3.10.0-514.28.1.el7, kernel-tools 3.10.0-514.28.1.el7, kernel-tools-libs 3.10.0-514.28.1.el7, kernel-abi-whitelists 3.10.0-514.28.1.el7, +1 more
    fixed: vendor fix RHSA-2017:2437
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-693.el7
    fixed: vendor fix RHSA-2017:1842
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) kernel-debuginfo-common-x86_64 3.10.0-514.28.1.el7
    fixed: vendor fix RHSA-2017:2437
  • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt 3.10.0-693.rt56.617.el7, kernel-rt-trace 3.10.0-693.rt56.617.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-693.rt56.617.el7 Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt 3.10.0-693.rt56.617.el7, kernel-rt-kvm 3.10.0-693.rt56.617.el7, kernel-rt-trace 3.10.0-693.rt56.617.el7, kernel-rt-debug-kvm 3.10.0-693.rt56.617.el7, kernel-rt-trace-kvm 3.10.0-693.rt56.617.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-693.rt56.617.el7
    fixed: vendor fix RHSA-2017:2077
  • Red Hat Enterprise Linux Server (v. 7) perf 3.10.0-693.el7, kernel 3.10.0-693.el7, python-perf 3.10.0-693.el7, kernel-kdump 3.10.0-693.el7, kernel-tools 3.10.0-693.el7, kernel-tools-libs 3.10.0-693.el7, +6 more
    fixed: vendor fix RHSA-2017:1842
  • Red Hat Enterprise Linux Server EUS (v. 7.3) perf 3.10.0-514.28.1.el7, kernel 3.10.0-514.28.1.el7, python-perf 3.10.0-514.28.1.el7, kernel-kdump 3.10.0-514.28.1.el7, kernel-tools 3.10.0-514.28.1.el7, kernel-tools-libs 3.10.0-514.28.1.el7, +6 more
    fixed: vendor fix RHSA-2017:2437
show 5 more
  • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debuginfo-common-ppc64 3.10.0-693.el7, kernel-debuginfo-common-x86_64 3.10.0-693.el7, kernel-debuginfo-common-ppc64le 3.10.0-693.el7
    fixed: vendor fix RHSA-2017:1842
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.3) kernel-debuginfo-common-ppc64 3.10.0-514.28.1.el7, kernel-debuginfo-common-x86_64 3.10.0-514.28.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-514.28.1.el7
    fixed: vendor fix RHSA-2017:2437
  • Red Hat Enterprise Linux Workstation (v. 7) perf 3.10.0-693.el7, kernel 3.10.0-693.el7, python-perf 3.10.0-693.el7, kernel-tools 3.10.0-693.el7, kernel-tools-libs 3.10.0-693.el7, kernel-abi-whitelists 3.10.0-693.el7, +1 more Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-debuginfo-common-x86_64 3.10.0-693.el7
    fixed: vendor fix RHSA-2017:1842
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-693.2.1.rt56.585.el6rt, kernel-rt-trace 3.10.0-693.2.1.rt56.585.el6rt, kernel-rt-vanilla 3.10.0-693.2.1.rt56.585.el6rt, kernel-rt-firmware 3.10.0-693.2.1.rt56.585.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-693.2.1.rt56.585.el6rt
    fixed: vendor fix RHSA-2017:2669
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux Client (v. 7) kernel-headers 3.10.0-693.el7 Red Hat Enterprise Linux ComputeNode (v. 7) kernel-headers 3.10.0-693.el7 Red Hat Enterprise Linux Server (v. 7) kernel-headers 3.10.0-693.el7 Red Hat Enterprise Linux Workstation (v. 7) kernel-headers 3.10.0-693.el7
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

9.48% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-129 Improper Validation of Array Index
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.