{"id":"AZL-110656","summary":"CVE-2026-98900 affecting package kernel 6.6.157.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxen/gntalloc: validate grant count before allocation\n\ngntalloc_ioctl_alloc() allocates the grant-id array before checking\nwhether the requested count fits within the global grant limit. Counts\nabove that limit cannot succeed, so reject them before the\nuser-controlled allocation reaches kcalloc().\n\nUse a subtraction-based check while holding gref_mutex so adding the\nrequested count cannot wrap. Also cast the count before advancing the\nper-file index so the page-size multiplication is performed in 64-bit\narithmetic.","modified":"2026-10-30T05:35:37Z","published":"2026-10-23T12:18:24Z","upstream":["CVE-2026-98900"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98900"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.157.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-110656.json"}}],"schema_version":"1.9.2"}