CVE-2017-7895
CRITICALCVSS 9.8/10EPSS 10.81%
Last modified
CVE-2017-7895 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13 lack certain checks for the end of a buffer, which allows remote attackers to trigger pointer-arithmetic errors or possibly have unspecified other impact via crafted requests, related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.. EPSS estimates a 10.81% chance of exploitation in the next 30 days.
Description
The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13 lack certain checks for the end of a buffer, which allows remote attackers to trigger pointer-arithmetic errors or possibly have unspecified other impact via crafted requests, related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 3.2.89 |
| Linux | Linux Kernel | >= 3.3, < 3.16.44 |
| Linux | Linux Kernel | >= 3.17.0, < 4.1.40 |
| Linux | Linux Kernel | >= 4.2, < 4.4.67 |
| Linux | Linux Kernel | >= 4.5.0, < 4.9.26 |
| Linux | Linux Kernel | >= 4.10, < 4.10.14 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
References
- http://www.debian.org/security/2017/dsa-3886Third Party Advisory
- http://www.securityfocus.com/bid/98085Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1615Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1616Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1647Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1715Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1723Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1766Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1798Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2412Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2428Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2429Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2472Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2732Third Party Advisory
- https://github.com/torvalds/linux/commit/13bf9fbff0e5e099e2b6f003a0ab8ae145436309Patch, Third Party Advisory
- http://www.debian.org/security/2017/dsa-3886Third Party Advisory
- http://www.securityfocus.com/bid/98085Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1615Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1616Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1647Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1715Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1723Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1766Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:1798Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2412Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2428Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2429Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2472Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2732Third Party Advisory
- https://github.com/torvalds/linux/commit/13bf9fbff0e5e099e2b6f003a0ab8ae145436309Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2017-7895?
The NFSv2 and NFSv3 server implementations in the Linux kernel through 4.10.13 lack certain checks for the end of a buffer, which allows remote attackers to trigger pointer-arithmetic errors or possibly have unspecified other impact via crafted requests, related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.
How severe is CVE-2017-7895?
CVE-2017-7895 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 10.81% probability of exploitation in the next 30 days.
How do I fix CVE-2017-7895?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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