CVE-2018-1066: canonical ubuntu_linux NULL Pointer Dereference
Vulnerability summary
CVE-2018-1066 is a high (CVSS 7.1) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 3.44% chance of exploitation in the next 30 days, higher than 88.9% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 3Timeline
- 02-03-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The Linux kernel before version 4.11 is vulnerable to a NULL pointer dereference in fs/cifs/cifsencrypt.c:setup_ntlmv2_rsp() that allows an attacker controlling a CIFS server to kernel panic a client that has this server mounted, because an empty TargetInfo field in an NTLMSSP setup negotiation response is mishandled during session recovery.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.44%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.44% 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, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu17 products
- linux< 3.13.0-165.215 | < 4.4.0-87.110
- linux-aws< 4.4.0-1026.35
- linux-azure-6.11All versions (No fix recorded)
- linux-azure-fdeAll versions (No fix recorded)
- linux-azure-fde-5.15All versions (No fix recorded)
Debian2 products
- linux< 4.11.6-1
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04
Linux1 product
- linux_kernel≤ 4.10.15
4 vendors · 21 products
References
16 links
lists.debian.org/debian-lts-announce/2018/07/msg00015.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2018/07/msg00016.htmlMailing ListX Refsource MLISTThird Party Advisory
- github.com/torvalds/linux/commit/cabfb3680f78981d26c078a26e5c748531257ebbX Refsource MISCPatchThird Party AdvisoryREPORT