The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c.
CVE-2015-8104
“—” beside the score: it is equal to NVD's CVSS score.
Score 10.0 from GitHub Security Advisory (severity: MODERATE) published 2022-05-14. NVD baseline CVSS 10.0; sources differ by 0.0.
Also known asEUVD-2015-7996 (ENISA EUVD) · GHSA-878r-5qjm-6859 (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 10.0
- EG Score
- 10.0CRITICALmedium confidence
- EG Risk
- 61EG Risk 61/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity100% × 45%Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation2.5% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 2.5%
- EPSS %ILE
- 84th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.
- EG Severity
- 10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 2.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
November 16, 2015
Last Modified
May 6, 2026
Advisory Details (1)
Auto-updated Oct 30, 2026KVM: svm: unconditionally intercept #DB - kernel/git/torvalds/linux.git - Linux kernel source tree
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cbdb967af3d54993f5814f1cee0ed311a055377dPatch Availability(15)
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(13 across 6 ecosystems)
Debian:8(3)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 3.16.7-ckt11-1 ... 3.16.7-ckt9-3~deb8u1~bpo70+1 (18 versions) |
| — |
| virtualbox | 1.4.0svn4130-dfsg-1 ... 4.3.6-dfsg-2~bpo70+1 (63 versions) |
| — |
| xen | 4.4.1-9, 4.4.1-9+deb8u1, 4.4.1-9+deb8u2 |
| — |
Debian:11(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
| xen | — |
| — |
Debian:12(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
| xen | — |
| — |
Debian:13(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
| xen | — |
| — |
Debian:14(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
| xen | — |
| — |
Debian:7(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | 3.2.41-2 ... 3.2.73-2 (53 versions) |
| — |
| xen | 4.1.4-3 ... 4.1.4-4 (11 versions) |
| — |
All Vendor Advisories
(15)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Red HatRHSA-2015:2552IMPORTANT2015-11-10
RHSA-2015:2552 — Important
- Red HatRHSA-2015:2636IMPORTANT2015-11-10
RHSA-2015:2636 — Important
- Red HatRHSA-2015:2645IMPORTANT2015-11-10
RHSA-2015:2645 — Important
- Red HatRHSA-2016:0004IMPORTANT2015-11-10
RHSA-2016:0004 — Important
- Red HatRHSA-2016:0024IMPORTANT2015-11-10
RHSA-2016:0024 — Important
- Red HatRHSA-2016:0046IMPORTANT2015-11-10
RHSA-2016:0046 — Important
- Red HatRHSA-2016:0103IMPORTANT2015-11-10
RHSA-2016:0103 — Important
- UbuntuUSN-2840-1HIGH
Linux kernel vulnerabilities
- UbuntuUSN-2841-1HIGH
Linux kernel vulnerabilities
- UbuntuUSN-2841-2HIGH
Linux kernel (Trusty HWE) vulnerabilities
- UbuntuUSN-2842-1HIGH
Linux kernel vulnerabilities
- UbuntuUSN-2842-2HIGH
Linux kernel (Vivid HWE) vulnerabilities
- UbuntuUSN-2843-1HIGH
Linux kernel vulnerabilities
- UbuntuUSN-2843-2HIGH
Linux kernel (Wily HWE) vulnerabilities
- UbuntuUSN-2844-1HIGH
Linux kernel (Utopic HWE) vulnerabilities
Data Freshness Timeline
(refreshed 32× in last 7d / 98× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 99 of 273 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 174 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 08:25 UTCOSV refresh
- 2026-11-02 04:20 UTCEG score recompute
- 2026-11-02 04:20 UTCVendor advisory
- 2026-11-02 04:20 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub severity MODERATE · GitHub CVSS 10.0
- 2026-11-01 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-11-01 05:59 UTCEG score recompute
- 2026-11-01 05:59 UTCVendor advisory
- 2026-11-01 05:59 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-31 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-31 07:40 UTCEG score recompute
- 2026-10-31 07:40 UTCVendor advisory
- 2026-10-31 07:40 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-30 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-30 09:22 UTCEG score recompute
- 2026-10-30 09:22 UTCVendor advisory
- 2026-10-30 09:21 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-29 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-29 11:03 UTCEG score recompute
- 2026-10-29 11:03 UTCVendor advisory
- 2026-10-29 11:02 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-28 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-28 12:33 UTCEG score recompute
- 2026-10-28 12:33 UTCVendor advisory
- 2026-10-28 12:33 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-27 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
Show 74 moreShow fewer
- 2026-10-27 14:14 UTCEG score recompute
- 2026-10-27 14:14 UTCVendor advisory
- 2026-10-27 14:14 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-26 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-26 15:22 UTCEG score recompute
- 2026-10-26 15:22 UTCVendor advisory
- 2026-10-26 15:22 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-25 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-25 16:14 UTCEG score recompute
- 2026-10-25 16:14 UTCVendor advisory
- 2026-10-25 16:14 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-24 17:56 UTCEG score recompute
- 2026-10-24 17:56 UTCVendor advisory
- 2026-10-24 17:56 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-24 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-23 19:38 UTCEG score recompute
- 2026-10-23 19:38 UTCVendor advisory
- 2026-10-23 19:38 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-23 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-22 21:03 UTCEG score recompute
- 2026-10-22 21:03 UTCVendor advisory
- 2026-10-22 21:02 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-22 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-21 22:44 UTCEG score recompute
- 2026-10-21 22:44 UTCVendor advisory
- 2026-10-21 22:44 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-21 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-21 00:26 UTCEG score recompute
- 2026-10-21 00:26 UTCVendor advisory
- 2026-10-21 00:26 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-20 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-20 02:05 UTCEG score recompute
- 2026-10-20 02:05 UTCVendor advisory
- 2026-10-20 02:05 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-19 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-19 01:17 UTCEG score recompute
- 2026-10-19 01:17 UTCVendor advisory
- 2026-10-19 01:17 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-18 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-18 02:58 UTCEG score recompute
- 2026-10-18 02:58 UTCVendor advisory
- 2026-10-18 02:57 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-17 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-17 04:37 UTCEG score recompute
- 2026-10-17 04:37 UTCVendor advisory
- 2026-10-17 04:37 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-16 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-16 06:17 UTCEG score recompute
- 2026-10-16 06:17 UTCVendor advisory
- 2026-10-16 06:16 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-15 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-15 04:55 UTCEG score recompute
- 2026-10-15 04:55 UTCVendor advisory
- 2026-10-15 04:54 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-14 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-14 00:46 UTCEG score recompute
- 2026-10-14 00:46 UTCVendor advisory
- 2026-10-14 00:46 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-13 16:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-12 20:49 UTCVendor advisory
- 2026-10-12 20:49 UTCGHSA enrichmentGHSA-878r-5qjm-6859 · GitHub CVSS 10.0
- 2026-10-12 20:49 UTCEG score recompute
- 2026-10-12 16:27 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-12 01:12 UTCEG score recompute
- 2026-10-11 13:40 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-10 19:54 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-09 20:01 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-08 16:35 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-07 23:40 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-06 15:11 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-05 17:38 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-10-04 14:18 UTCOSV refresh
- 2026-10-03 14:21 UTCEPSS rescoreEPSS 2.5% · 84th percentile
- 2026-09-30 14:58 UTCEPSS rescoreEPSS 2.5% · 84th percentile
Related CVEs(same product + same vendor)
Same product
10 shownDebian:8:virtualbox · Debian:8:xen
Same vendor
9 shownubuntu:USN-2841-1 · redhat:RHSA-2015:2552 · ubuntu:USN-2842-1
Frequently asked(5)
What is CVE-2015-8104?
When was CVE-2015-8104 made public?
Is CVE-2015-8104 actively exploited?
What is the CVSS score of CVE-2015-8104?
How do I remediate CVE-2015-8104?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2015-8104
Is Your Infrastructure Affected by CVE-2015-8104?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.