What’s Vulnerable › Vulnerabilities

CVE-2017-7895

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-04-28 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• Debian Linux: 8.0, 9.0
• Linux kernel: before 3.2.89; from 3.3 before 3.16.44; from 3.17.0 before 4.1.40; from 4.2 before 4.4.67; from 4.5.0 before 4.9.26; from 4.10 before 4.10.14 — fixed in 3.16.44, 3.2.89, 4.1.40, 4.10.14, 4.4.67, 4.9.26

How to fix

Upgrade to a fixed version: Linux kernel 3.16.44, 3.2.89, 4.1.40, 4.10.14. Check the vendor advisory for mitigations.

References

• http://www.debian.org/security/2017/dsa-3886
• http://www.securityfocus.com/bid/98085
• https://access.redhat.com/errata/RHSA-2017:1615
• https://access.redhat.com/errata/RHSA-2017:1616
• https://access.redhat.com/errata/RHSA-2017:1647
• https://access.redhat.com/errata/RHSA-2017:1715
• https://access.redhat.com/errata/RHSA-2017:1723
• https://access.redhat.com/errata/RHSA-2017:1766
• https://access.redhat.com/errata/RHSA-2017:1798
• https://access.redhat.com/errata/RHSA-2017:2412
• https://access.redhat.com/errata/RHSA-2017:2428
• https://access.redhat.com/errata/RHSA-2017:2429

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