{"cve":"CVE-2026-74735","nvd":{"published":"2026-08-26T15:16:52.057","modified":"2026-10-21T13:19:53.203","status":"Received","description":"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->tunnel and pd->session) 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->tunnel / pd->session is left un-dropped when seq_file private data is freed.\n\nFix this by dropping any remaining pd->tunnel and pd->session references in\npppol2tp_proc_release() and l2tp_dfs_seq_release() when closing the file.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/8c4fde01bcf91f22b9c7ded8c3e14addd7ddd500","https://git.kernel.org/stable/c/9006c116dd111d457bf5d074990210f70a4ad2c8","https://git.kernel.org/stable/c/bd897e414451fb34dfdf08b31899180e5ab7149b","https://git.kernel.org/stable/c/bdf83613781956cc39798ed08321f74ab0467f4d","https://git.kernel.org/stable/c/ebe2774e956482dd3c70b8991f6f7654356339e6"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-74735","score":0.00176,"percentile":0.07067,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}