CVE-2018-12904: canonical ubuntu_linux
Vulnerability summary
CVE-2018-12904 is a medium (CVSS 4.9) vulnerability in canonical ubuntu_linux. EPSS estimates a 1.14% chance of exploitation in the next 30 days, higher than 66.6% of scored vulnerabilities. 2 public exploits are recorded.
Not severe (CVSS 4.9, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 4Timeline
- 27-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In arch/x86/kvm/vmx.c in the Linux kernel before 4.17.2, when nested virtualization is used, local attackers could cause L1 KVM guests to VMEXIT, potentially allowing privilege escalations and denial of service attacks due to lack of checking of CPL.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated4.9MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- OSV · DebianEcosystem advisory · calculated4.9MediumCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS trend
Probability
1.14%
Chance of exploitation in the next 30 days
Percentile
67%
Versus all other CVEs
30-day change
Decrease -0.04 pp
From 1.18% 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 foundExploit Reference (bugs.chromium.org)
Maturity: unknown
KVM (Nested Virtualization) - L1 Guest Privilege Escalation
Maturity: poc
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu8 products
- linux< 4.15.0-33.36
- linux-aws< 4.15.0-1020.20
- linux-azure< 4.15.0-1022.22~16.04.1 | < 4.15.0-1022.23
- linux-gcp< 4.15.0-1018.19~16.04.2 | < 4.15.0-1018.19
- linux-hwe< 4.15.0-33.36~16.04.1
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04
Debian1 product
- linux< 4.16.16-1
Linux1 product
- linux_kernel< 4.17.2
4 vendors · 11 products
References
14 links- github.com/torvalds/linux/commit/727ba748e110b4de50d142edca9d6a9b7e6111d8X Refsource MISCPatchThird Party Advisory
