CVE-2015-6855: arista eos Divide By Zero
Vulnerability summary
CVE-2015-6855 is a high (CVSS 7.5) Divide By Zero vulnerability in arista eos. EPSS estimates a 3.50% chance of exploitation in the next 30 days, higher than 89.1% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 4% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 10Timeline
- 06-11-2015PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
hw/ide/core.c in QEMU does not properly restrict the commands accepted by an ATAPI device, which allows guest users to cause a denial of service or possibly have unspecified other impact via certain IDE commands, as demonstrated by a WIN_READ_NATIVE_MAX command to an empty drive, which triggers a divide-by-zero error and instance crash.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.50%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.50% 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: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- qemu< 1:2.4+dfsg-2
- debian_linuxEOL7.0 | 8.0 | 9.0
Suse2 products
Arista1 product
- eosna
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 15.04
Fedoraproject1 product
- fedoraEOL21 | 22 | 23
Qemu1 product
- qemu≤ 2.4.1
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.19
7 vendors · 9 products
References
20 links
- lists.fedoraproject.org/pipermail/package-announce/2015-October/169036.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2015-September/167369.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2015-October/169341.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2015-10/msg00019.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2015/09/10/1Mailing ListX Refsource MLISTThird Party AdvisoryREPORT
- lists.fedoraproject.org/pipermail/package-announce/2015-October/169039.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
Show all 20 references
- lists.fedoraproject.org/pipermail/package-announce/2015-October/168602.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- lists.gnu.org/archive/html/qemu-devel/2015-09/msg02479.htmlMailing ListX Refsource MLISTThird Party AdvisoryREPORT
- lists.fedoraproject.org/pipermail/package-announce/2015-October/169327.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- www.arista.com/en/support/advisories-notices/security-advisories/1188-security-advisory-14X Refsource MISCThird Party Advisory