SARA / Free Tools / CVE / CVE-2019-19580

CVE-2019-19580 — An issue was discovered in Xen through 4

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in rest

CVSS
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EPSS
0.62% (top 30.20%)
CWE
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Published
2019-12-11T16:51:43.000Z
Last modified
2024-08-05T02:16:48.295Z
CVSS vector
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01What is this vulnerability?

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations, because of an incomplete fix for CVE-2019-18421. XSA-299 addressed several critical issues in restartable PV type change operations. Despite extensive testing and auditing, some corner cases were missed. A malicious…

02Affected products

VendorProductVersions
na / n/an/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

CVE-2019-18421
Cited in vendor advisory

08Timeline

09References

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