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Race Condition The advisory has been revoked - it doesn't affect any version of package xen-doc-html  (opens in a new tab)

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EPSS
1.19% (64th percentile)

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  • Snyk IDSNYK-SLES151-XENDOCHTML-2721004
  • published14 Apr 2022
  • disclosed18 Dec 2019
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Introduced: 18 Dec 2019

CVE-2019-19580  (opens in a new tab)
CWE-362  (opens in a new tab)

Amendment

The SLES security team deemed this advisory irrelevant for SLES:15.1.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen-doc-html package and not the xen-doc-html package as distributed by SLES.

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 PV guest administrator may be able to escalate their privilege to that of the host. All security-supported versions of Xen are vulnerable. Only x86 systems are affected. Arm systems are not affected. Only x86 PV guests can leverage the vulnerability. x86 HVM and PVH guests cannot leverage the vulnerability. Note that these attacks require very precise timing, which may be difficult to exploit in practice.

References