{"id":"AZL-67434","summary":"CVE-2025-39826 affecting package kernel for versions less than 6.6.104.2-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: convert 'use' field to refcount_t\n\nThe 'use' field in struct rose_neigh is used as a reference counter but\nlacks atomicity. This can lead to race conditions where a rose_neigh\nstructure is freed while still being referenced by other code paths.\n\nFor example, when rose_neigh-\u003euse becomes zero during an ioctl operation\nvia rose_rt_ioctl(), the structure may be removed while its timer is\nstill active, potentially causing use-after-free issues.\n\nThis patch changes the type of 'use' from unsigned short to refcount_t and\nupdates all code paths to use rose_neigh_hold() and rose_neigh_put() which\noperate reference counts atomically.","modified":"2026-04-01T05:21:12.350075Z","published":"2025-09-16T13:16:02Z","upstream":["CVE-2025-39826"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-39826"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.104.2-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-67434.json"}}],"schema_version":"1.7.5"}