{"id":"AZL-71242","summary":"CVE-2023-53254 affecting package kernel 5.15.200.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncacheinfo: Fix shared_cpu_map to handle shared caches at different levels\n\nThe cacheinfo sets up the shared_cpu_map by checking whether the caches\nwith the same index are shared between CPUs. However, this will trigger\nslab-out-of-bounds access if the CPUs do not have the same cache hierarchy.\nAnother problem is the mismatched shared_cpu_map when the shared cache does\nnot have the same index between CPUs.\n\nCPU0\tI\tD\tL3\nindex\t0\t1\t2\tx\n\t^\t^\t^\t^\nindex\t0\t1\t2\t3\nCPU1\tI\tD\tL2\tL3\n\nThis patch checks each cache is shared with all caches on other CPUs.","modified":"2026-04-01T05:22:31.209665Z","published":"2025-09-15T15:15:52Z","upstream":["CVE-2023-53254"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53254"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"5.15.200.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-71242.json"}}],"schema_version":"1.7.5"}