CVE-2012-2121: linux linux_kernel
Vulnerability summary
CVE-2012-2121 is a medium (CVSS 4.9) vulnerability in linux linux_kernel. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 35.6% of scored vulnerabilities.
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 3Timeline
- 17-05-2012PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
0.41%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.41% 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
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication (CVSS vector). Other conditions: not stated in public data.
Ubuntu14 products
- linux< 3.11.0-12.19 | < 4.2.0-16.19
- linux-aws< 4.4.0-1002.2 | < 4.4.0-1001.10
- linux-flo< 3.4.0-1.3 | < 3.4.0-5.22
- linux-gke< 4.4.0-1003.3
- linux-goldfish< 3.4.0-1.9 | < 3.4.0-4.27
Linux1 product
- linux_kernel≤ 3.3.3
2 vendors · 15 products
References
25 links- bugzilla.redhat.com/show_bug.cgi?id=814149X Refsource CONFIRM
- github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195X Refsource CONFIRM
- www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4X Refsource CONFIRM