{"id":"AZL-74936","summary":"CVE-2025-39880 affecting package kernel for versions less than 5.15.200.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: fix invalid accesses to ceph_connection_v1_info\n\nThere is a place where generic code in messenger.c is reading and\nanother place where it is writing to con-\u003ev1 union member without\nchecking that the union member is active (i.e. msgr1 is in use).\n\nOn 64-bit systems, con-\u003ev1.auth_retry overlaps with con-\u003ev2.out_iter,\nso such a read is almost guaranteed to return a bogus value instead of\n0 when msgr2 is in use.  This ends up being fairly benign because the\nside effect is just the invalidation of the authorizer and successive\nfetching of new tickets.\n\ncon-\u003ev1.connect_seq overlaps with con-\u003ev2.conn_bufs and the fact that\nit's being written to can cause more serious consequences, but luckily\nit's not something that happens often.","modified":"2026-04-01T05:22:47.293043Z","published":"2025-09-23T06:15:47Z","upstream":["CVE-2025-39880"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39880"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.200.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-74936.json"}}],"schema_version":"1.7.5"}