{"id":"AZL-97743","summary":"CVE-2026-74735 affecting package kernel 6.6.150.1-1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nl2tp: fix tunnel and session refcount leak on seq_file release\n\nIn pppol2tp_proc_open() and l2tp_dfs_seq_open(), iteration state\n(pd-\u003etunnel and pd-\u003esession) is kept in seq_file private data to allow\niteration across multiple read() system calls.\n\nHowever, if userspace closes /proc/net/pppol2tp or /sys/kernel/debug/l2tp/tunnels\nbefore reading to end-of-file (EOF), any tunnel or session reference stored in\npd-\u003etunnel / pd-\u003esession is left un-dropped when seq_file private data is freed.\n\nFix this by dropping any remaining pd-\u003etunnel and pd-\u003esession references in\npppol2tp_proc_release() and l2tp_dfs_seq_release() when closing the file.","modified":"2026-08-30T05:26:50Z","published":"2026-08-26T15:16:52Z","upstream":["CVE-2026-74735"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74735"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.150.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-97743.json"}}],"schema_version":"1.9.0"}