What’s Vulnerable › Vulnerabilities

CVE-2018-15470

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-08-17 · updated 2026-06-17
• Weakness: CWE-400

Description

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.

Affected products

• xen: through 4.11.0

References

• http://xenbits.xen.org/xsa/advisory-272.html
• https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
• https://security.gentoo.org/glsa/201810-06
• http://xenbits.xen.org/xsa/advisory-272.html
• https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
• https://security.gentoo.org/glsa/201810-06

Get alerted when CVE-2018-15470 or the next vulnerability affects your stack