CVE-2018-16871: linux linux_kernel NULL Pointer Dereference
Vulnerability summary
CVE-2018-16871 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 2.70% chance of exploitation in the next 30 days, higher than 85.9% of scored vulnerabilities.
Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 19 · Related 12Timeline
- 30-07-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A flaw was found in the Linux kernel's NFS implementation, all versions 3.x and all versions 4.x up to 4.20. An attacker, who is able to mount an exported NFS filesystem, is able to trigger a null pointer dereference by using an invalid NFS sequence. This can panic the machine and deny access to the NFS server. Any outstanding disk writes to the NFS server will be lost.
CVSS metrics
7 scores · 4 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.70%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.70% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu17 products
- linux< 4.15.0-46.49
- linux-aws< 4.15.0-1033.35
- linux-aws-hwe< 4.15.0-1033.35~16.04.1
- linux-azure< 4.15.0-1040.44~14.04.1 | < 4.15.0-1040.44 | < 4.18.0-1011.11~18.04.1
- linux-azure-fdeAll versions (No fix recorded)
Redhat10 products
- developer_tools1.0
- enterprise_linuxEOL7.0
- enterprise_linux_desktop7.0
- enterprise_linux_eus7.4
- enterprise_linux_server7.0
Debian1 product
- linux< 4.18.20-1
Linux1 product
- linux_kernel≥ 3.0, ≤ 4.20
Red hat1 product
- kernel:all 3.x, all 4.x up to 4.20
6 vendors · 39 products
References
11 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16871X Refsource CONFIRMIssue TrackingThird Party Advisory
