{"api_version":"1","generated_at":"2026-04-22T23:21:58+00:00","cve":"CVE-2020-29569","urls":{"html":"https://cve.report/CVE-2020-29569","api":"https://cve.report/api/cve/CVE-2020-29569.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-29569","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-29569"},"summary":{"title":"CVE-2020-29569","description":"An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. 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