CVE-2018-1123: canonical ubuntu_linux Heap-based Buffer Overflow
Vulnerability summary
CVE-2018-1123 is a high (CVSS 7.5) Heap-based Buffer Overflow vulnerability in canonical ubuntu_linux. EPSS estimates a 8.90% chance of exploitation in the next 30 days, higher than 95.1% of scored vulnerabilities. 2 public exploits are recorded.
Advisory lineage
Upstream 0 · Downstream 12 · Related 10Timeline
- 23-05-2018PublishedVulnerability first disclosed.
- 17-12-2025Last modifiedVulnerability information updated.
Description
procps-ng before version 3.3.15 is vulnerable to a denial of service in ps via mmap buffer overflow. Inbuilt protection in ps maps a guard page at the end of the overflowed buffer, ensuring that the impact of this flaw is limited to a crash (temporary denial of service).
CVSS metrics
5 scores · 4 sources · 2 versions- CVE.orgCNA3.9LowCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated3.9LowCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:LDiffers
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
8.90%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
-0.18 pp
From 9.08% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (qualys.com)
Maturity: unknown
Procps-ng - Multiple Vulnerabilities
Maturity: poc
Weaknesses
CWE · root cause- CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
Affected systems
Debian2 products
- procps< 2:3.3.15-1
- debian_linuxEOL7.0 | 8.0 | 9.0
[unknown]1 product
- procps-ng, procpsprocps-ng 3.3.15
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 17.10 | 18.04
Procps-ng_project1 product
- procps-ng< 3.3.15
Ubuntu1 product
- procps< 1:3.3.9-1ubuntu2.3 | < 2:3.3.10-4ubuntu2.4 | < 2:3.3.12-3ubuntu1.1
5 vendors · 6 products
References
19 links
- lists.debian.org/debian-lts-announce/2018/05/msg00021.htmlMailing ListX Refsource MLISTThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1123X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
- www.qualys.com/2018/05/17/procps-ng-audit-report-advisory.txtX Refsource MISCExploitThird Party AdvisoryREPORT