CVE-2016-8630: linux linux_kernel Improper Access Control
Vulnerability summary
CVE-2016-8630 is a medium (CVSS 5.5) Improper Access Control vulnerability in linux linux_kernel. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 30.4% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 4Timeline
- 28-11-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The x86_decode_insn function in arch/x86/kvm/emulate.c in the Linux kernel before 4.8.7, when KVM is enabled, allows local users to cause a denial of service (host OS crash) via a certain use of a ModR/M byte in an undefined instruction.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.36%
Chance of exploitation in the next 30 days
Percentile
30%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.36% on 05-10-2026
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, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu4 products
- linux< 4.4.0-57.78
- linux-lts-xenial< 4.4.0-57.78~14.04.1
- linux-raspi2< 4.4.0-1038.45
- linux-snapdragon< 4.4.0-1042.46
Debian1 product
- linux< 4.8.7-1
Linux1 product
- linux_kernel≤ 4.8.6
3 vendors · 6 products
References
17 links- github.com/torvalds/linux/commit/d9092f52d7e61dd1557f2db2400ddb430e85937eX Refsource CONFIRMIssue TrackingPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2016/11/22/3Mailing ListX Refsource MLISTThird Party AdvisoryREPORT
