MediumFix available
xen — security advisory
An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 "Operations on data structures" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.
- Products
- xen
- Affected versions
- Not specified
- Fixed versions
- 4.10.1-r3, 4.11.1-r0, 4.8.5-r0, 4.9.3-r0
- CVEs
- CVE-2018-15470
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 21:58 UTC · Revision 1
Source evidence
An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 "Operations on data structures" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.
osv:ALPINE-CVE-2018-15470
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.11.1-r0
xen
Fixed versions: 4.8.5-r0
xen
Fixed versions: 4.9.3-r0
xen
Fixed versions: 4.10.1-r3
xen
Fixed versions: 4.11.1-r0
Complete source record
{
"id": "60e54a870d85ad393d9a7e21780dbb1d54f060e62e8e4152499dc07976f3474f",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2018-15470",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2018-15470",
"summary": "An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 \"Operations on data structures\" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.",
"evidence": "osv:ALPINE-CVE-2018-15470",
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],
"modified": "2026-10-23T17:17:55.220867942Z",
"provider": "osv",
"upstream": [
"CVE-2018-15470"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2018-15470"
]
},
"related_cves": [
{
"value": "CVE-2018-15470",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 415060,
"published_at": "2018-08-17T18:29:00.977+00:00"
}