CVE-2018-5407: canonical ubuntu_linux
Vulnerability summary
CVE-2018-5407 is a medium (CVSS 4.7) vulnerability in canonical ubuntu_linux. EPSS estimates a 3.42% chance of exploitation in the next 30 days, higher than 88.9% of scored vulnerabilities. 2 public exploits are recorded.
Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 22 · Related 13Timeline
- 15-11-2018PublishedVulnerability first disclosed.
- 08-10-2026Last modifiedVulnerability information updated.
Description
Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.
CVSS metrics
7 scores · 5 sources · 3 versions- OSV · AlpineEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated4.7MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
EPSS trend
Probability
3.42%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.42% 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
2 foundPortsmash
Maturity: poc
Intel (Skylake / Kaby Lake) - 'PortSmash' CPU SMT Side-Channel
Maturity: poc
Weaknesses
CWE · root cause- CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
- CWE-203Observable DiscrepancyThe product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat16 products
- enterprise_linux_desktop7.0
- enterprise_linux_server7.0 | 7.6
- enterprise_linux_server_aus7.6
- enterprise_linux_server_eus7.6
- enterprise_linux_server_tus7.6
Oracle9 products
- api_gateway11.1.2.4.0
- application_server0.9.8 | 1.0.0 | 1.0.1
- enterprise_manager_base_platform12.1.0.5.0 | 13.2.0.0.0 | 13.3.0.0.0
- enterprise_manager_ops_center12.3.3
- mysql_enterprise_backup≤ 3.12.3 | ≥ 3.12.4, ≤ 4.1.2
Debian2 products
- openssl< 1.1.1~~pre9-1
- debian_linuxEOL8.0 | 9.0
Ubuntu2 products
- openssl< 1.0.1f-1ubuntu2.27 | < 1.0.2g-1ubuntu4.14 | < 1.1.0g-2ubuntu4.3
- openssl1.0< 1.0.2n-1ubuntu5.2
Alpine1 product
- openssl≥ 1.0.2, < 1.0.2q-r0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 18.10
Nodejs1 product
- node.js< 6.14.4 | ≥ 8.0.0, < 8.11.4 | ≥ 10.0.0, < 10.9.0
Openssl1 product
- openssl≥ 1.0.2, < 1.0.2q | ≥ 1.1.0, < 1.1.0i
Tenable1 product
- nessus< 8.1.1
9 vendors · 34 products
References
70 links- www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlX Refsource CONFIRMPatchVendor Advisory
- nodejs.org/en/blog/vulnerability/november-2018-security-releases/X Refsource CONFIRMThird Party Advisory
Show all 70 references
- lists.debian.org/debian-lts-announce/2018/11/msg00024.htmlMailing ListX Refsource MLISTThird Party Advisory
- www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlX Refsource MISCPatchThird Party Advisory
- www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.htmlX Refsource MISCPatchThird Party Advisory
