CVE-2018-7740: canonical ubuntu_linux
Vulnerability summary
CVE-2018-7740 is a medium (CVSS 5.5) vulnerability in canonical ubuntu_linux. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 47.9% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 11 · Related 6Timeline
- 07-03-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The resv_map_release function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remap_file_pages system call.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.58%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.58% 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
1 foundExploit Reference (bugzilla.kernel.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu21 products
- linuxAll versions (No fix recorded) | < 4.4.0-143.169
- linux-aws< 4.4.0-1039.42 | < 4.4.0-1077.87
- linux-azure< 4.15.0-1013.13~16.04.2
- linux-azure-6.11All versions (No fix recorded)
- linux-azure-fdeAll versions (No fix recorded)
Redhat4 products
Debian2 products
- linux< 4.15.17-1
- debian_linuxEOL7.0 | 8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04
Linux1 product
- linux_kernel≤ 4.15.7
5 vendors · 29 products
References
14 links
- bugzilla.kernel.org/show_bug.cgi?id=199037X Refsource CONFIRMExploitIssue TrackingThird Party AdvisoryREPORT
- lists.debian.org/debian-lts-announce/2018/05/msg00000.htmlMailing ListX Refsource MLISTThird Party Advisory