{"cve":"CVE-2022-50241","nvd":{"published":"2025-09-15T14:15:34.360","modified":"2026-10-15T22:17:28.173","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix use-after-free on source server when doing inter-server copy\n\nUse-after-free occurred when the laundromat tried to free expired\ncpntf_state entry on the s2s_cp_stateids list after inter-server\ncopy completed. The sc_cp_list that the expired copy state was\ninserted on was already freed.\n\nWhen COPY completes, the Linux client normally sends LOCKU(lock_state x),\nFREE_STATEID(lock_state x) and CLOSE(open_state y) to the source server.\nThe nfs4_put_stid call from nfsd4_free_stateid cleans up the copy state\nfrom the s2s_cp_stateids list before freeing the lock state's stid.\n\nHowever, sometimes the CLOSE was sent before the FREE_STATEID request.\nWhen this happens, the nfsd4_close_open_stateid call from nfsd4_close\nfrees all lock states on its st_locks list without cleaning up the copy\nstate on the sc_cp_list list. When the time the FREE_STATEID arrives the\nserver returns BAD_STATEID since the lock state was freed. This causes\nthe use-after-free error to occur when the laundromat tries to free\nthe expired cpntf_state.\n\nThis patch adds a call to nfs4_free_cpntf_statelist in\nnfsd4_close_open_stateid to clean up the copy state before calling\nfree_ol_stateid_reaplist to free the lock state's stid on the reaplist.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/019805fea91599b22dfa62ffb29c022f35abeb06","https://git.kernel.org/stable/c/35aa0fb8c3033a3d78603356e96fc18c5b9cceb2","https://git.kernel.org/stable/c/6ea71246b7a02af675d733e72d14bd0d591d5f4a","https://git.kernel.org/stable/c/83b94969751a691347606dbe6b1865efcfa5a643","https://git.kernel.org/stable/c/bbacfcde5fff25ac22597e8373a065c647da6738"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:08:41.295252406+00:00"},"epss":{"cve":"CVE-2022-50241","score":0.0037,"percentile":0.30624,"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."]}