{"api_version":"1","generated_at":"2026-04-23T00:42:22+00:00","cve":"CVE-2021-26931","urls":{"html":"https://cve.report/CVE-2021-26931","api":"https://cve.report/api/cve/CVE-2021-26931.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-26931","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-26931"},"summary":{"title":"CVE-2021-26931","description":"An issue was discovered in the Linux kernel 2.6.39 through 5.10.16, as used in Xen. Block, net, and SCSI backends consider certain errors a plain bug, deliberately causing a kernel crash. For errors potentially being at least under the influence of guests (such as out of memory conditions), it isn't correct to assume a plain bug. Memory allocations potentially causing such crashes occur only when Linux is running in PV mode, though. 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