{"apiVersion":"1.0","identifier":"CVE-2026-74735","description":"In the Linux kernel, the following vulnerability has been resolved: l2tp: fix tunnel and session refcount leak on seq_file release In pppol2tp_proc_open() and l2tp_dfs_seq_open(), iteration state (pd->tunnel and pd->session) is kept in seq_file private data to allow iteration across multiple read() system calls. However, if userspace closes /proc/net/pppol2tp or /sys/kernel/debug/l2tp/tunnels before reading to end-of-file (EOF), any tunnel or session reference stored in pd->tunnel / pd->session is left un-dropped when seq_file private data is freed. Fix this by dropping any remaining pd->tunnel and pd->session references in pppol2tp_proc_release() and l2tp_dfs_seq_release() when closing the file.","publishedAt":"2026-08-26T15:16:52","lastModifiedAt":"2026-08-26T15:16:52","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74735","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00162,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74735","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74735","en":"https://www.redsauce.net/en/cves/CVE-2026-74735","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74735","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74735","de":"https://www.redsauce.net/de/cves/CVE-2026-74735","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74735","el":"https://www.redsauce.net/el/cves/CVE-2026-74735"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74735"}}