{"id":"AZL-106287","summary":"CVE-2026-98177 affecting package kernel 6.6.157.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Avoid integer underflow in EOP ring size calculation.\n\nThe low 6 bits of cp_hqd_eop_control store the base-2 logarithm\nof the EOP ring size. This was calculated as\n\norder_base_2(q-\u003eeop_ring_buffer_size / 4) - 1\n\nBut order_base_2 can in theory return 0, so this could underflow\n(although in practice the ring buffer size cannot be less than 4096).\n\nChange this to\n\norder_base_2(q-\u003eeop_ring_buffer_size / 8)\n\nusing properties of logarithms.\n\nAlso add to the above comment to make the mathematics more clear.\n\n(cherry picked from commit f0f43fcf8b2b3a924cad9444340921c96ed5f634)","modified":"2026-10-08T05:35:32Z","published":"2026-10-06T09:17:59Z","upstream":["CVE-2026-98177"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98177"}],"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-106287.json"}}],"schema_version":"1.9.0"}