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CVE-2020-2732A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is…
- 5.8MediumCVSS base score
- 0.93%Exploitation in 30 daysEPSS · top 39% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.
Timeline
ID reserved
By oracle
- 4 months later
· 4 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| oracleCNA (assigner) | 3.1 | Medium5.8 | CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium6.8 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.93% · top 39% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.8.
Affected products
Oracle Corporation · Oracle Linux
- affected 7
- affected 6
References
References14
- https://www.openwall.com/lists/oss-security/2020/02/25/3 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.spinics.net/lists/kvm/msg208259.html (opens in a new tab)x_refsource_MISCx_transferred
- https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec (opens in a new tab)x_refsource_MISCx_transferred
- https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c (opens in a new tab)x_refsource_MISCx_transferred
- https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1805135 (opens in a new tab)x_refsource_MISCx_transferred
- https://linux.oracle.com/errata/ELSA-2020-5540.html (opens in a new tab)x_refsource_MISCx_transferred
- https://linux.oracle.com/errata/ELSA-2020-5542.html (opens in a new tab)x_refsource_MISCx_transferred
- https://linux.oracle.com/errata/ELSA-2020-5543.html (opens in a new tab)x_refsource_MISCx_transferred
- DSA-4667 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- DSA-4698 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-22525 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-2732)Record last updated .