CVE-2018-10918: canonical ubuntu_linux NULL Pointer Dereference
Vulnerability summary
CVE-2018-10918 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 2.51% chance of exploitation in the next 30 days, higher than 84.8% of scored vulnerabilities.
Not severe (CVSS 5.2, adjacent network); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 3Timeline
- 22-08-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.
CVSS metrics
6 scores · 5 sources · 2 versions- CVE.orgCNA5.2MediumCVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:HDiffers
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.2MediumCVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:HDiffers
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.51%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
Decrease -0.03 pp
From 2.55% 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: adjacent network, low-privilege account, user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- samba≥ 4.7.0, < 4.8.4-r0 | ≥ 4.7.0, < 4.7.6-r1
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04
Debian1 product
- samba< 2:4.8.4+dfsg-1
Samba1 product
- samba≥ 4.7.0, < 4.7.9 | ≥ 4.8.0, < 4.8.4
The samba team1 product
- sambaEOL4.7.9 | 4.8.4
Ubuntu1 product
- samba< 2:4.7.6+dfsg~ubuntu-0ubuntu2.2
6 vendors · 6 products
References
11 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10918X Refsource CONFIRMIssue TrackingThird Party Advisory
