kernel: nfsd: Incorrect handling of long RPC replies
Published Apr 18, 2017
7.5
HIGHCVSS 3.1
EPSS 5.91%
Description
The NFSv2/NFSv3 server in the nfsd subsystem in the Linux kernel through 4.10.11 allows remote attackers to cause a denial of service (system crash) via a long RPC reply, related to net/sunrpc/svc.c, fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c.
Affected products
No data.
Configuration 1
- < 3.2.89
- ≥ 3.3 · < 3.10.107
- ≥ 3.11 · < 3.12.74
- ≥ 3.13 · < 3.16.44
- ≥ 3.17 · < 3.18.52
- ≥ 3.19 · < 4.1.40
- ≥ 4.2 · < 4.4.66
- ≥ 4.5 · < 4.9.26
- ≥ 4.10 · < 4.10.14
Configuration 2
- 8.0
- 9.0
Configuration 3
- 14.04
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-696.28.1.el6
Fixed · RHSA-2018:1319
Red Hat Enterprise Linux 7
kernel-0:3.10.0-514.26.1.el7
Fixed · RHSA-2017:1615
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-514.26.1.rt56.442.el7
Fixed · RHSA-2017:1616
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-514.rt56.228.el6rt
Fixed · RHSA-2017:1647
Red Hat Enterprise Linux 5
kernel
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-696.28.1.el6 | Fixed | RHSA-2018:1319 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-514.26.1.el7 | Fixed | RHSA-2017:1615 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-514.26.1.rt56.442.el7 | Fixed | RHSA-2017:1616 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-514.rt56.228.el6rt | Fixed | RHSA-2017:1647 |
| Red Hat Enterprise Linux 5 | kernel | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2 may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (26 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.91% (0.05905) | 93.00th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.79% (0.05794) | 92.11th | v5 (v2026.06.15) |
| Apr 13, 2026 | 16.01% (0.16011) | 94.77th | v4 (v2025.03.14) |
| Jan 19, 2026 | 19.99% (0.19995) | 95.28th | v4 (v2025.03.14) |
| Nov 21, 2025 | 16.01% (0.16011) | 94.50th | v4 (v2025.03.14) |
| Nov 18, 2025 | 24.98% (0.24975) | 95.82th | v4 (v2025.03.14) |
| Mar 30, 2025 | 16.01% (0.16011) | 94.21th | v4 (v2025.03.14) |
| Mar 29, 2025 | 14.54% (0.14536) | 90.78th | v4 (v2025.03.14) |
| Mar 17, 2025 | 16.01% (0.16011) | 94.28th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.78% (0.02784) | 90.34th | v3 (v2023.03.01) |
| Jul 19, 2024 | 26.29% (0.26290) | 96.79th | v3 (v2023.03.01) |
| Mar 21, 2024 | 20.40% (0.20397) | 96.24th | v3 (v2023.03.01) |
| Feb 7, 2024 | 19.43% (0.19435) | 95.86th | v3 (v2023.03.01) |
| Oct 13, 2023 | 16.89% (0.16889) | 95.44th | v3 (v2023.03.01) |
| Jul 23, 2023 | 9.36% (0.09363) | 93.88th | v3 (v2023.03.01) |
| Jun 14, 2023 | 12.24% (0.12239) | 94.57th | v3 (v2023.03.01) |
| May 8, 2023 | 11.07% (0.11066) | 94.25th | v3 (v2023.03.01) |
| Mar 29, 2023 | 13.40% (0.13403) | 94.67th | v3 (v2023.03.01) |
| Mar 7, 2023 | 9.93% (0.09930) | 93.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.14% (0.04139) | 74.02th | v1 |
| Jan 6, 2022 | 4.14% (0.04139) | 73.79th | v1 |
| Sep 1, 2021 | 4.14% (0.04139) | 83.38th | v1 |
| Apr 14, 2021 | 4.14% (0.04139) | 0.00th | v1 |
References (16)
- http://www.debian.org/security/2017/dsa-3886 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.securityfocus.com/bid/97950 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1615 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1616 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1647 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1319 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-7645 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1443615 Issue Tracking
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e6838a29ecb484c97e4efef9429643b9851fba6e x_refsource_CONFIRMVendor Advisory
- https://github.com/torvalds/linux/commit/e6838a29ecb484c97e4efef9429643b9851fba6e x_refsource_CONFIRMPatchThird Party Advisory
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0 x_refsource_CONFIRMThird Party Advisory
- https://marc.info/?l=linux-nfs&m=149218228327497&w=2 x_refsource_MISCMailing ListPatchThird Party Advisory
- https://marc.info/?l=linux-nfs&m=149247516212924&w=2 x_refsource_MISCMailing ListPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-7645
- https://usn.ubuntu.com/3754-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-7645
Change history (0)
No recorded changes yet.