{"id":"CVE-2022-50401","summary":"nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure\n\nOn error situation `clp-\u003ecl_cb_conn.cb_xprt` should not be given\na reference to the xprt otherwise both client cleanup and the\nerror handling path of the caller call to put it. Better to\ndelay handing over the reference to a later branch.\n\n[   72.530665] refcount_t: underflow; use-after-free.\n[   72.531933] WARNING: CPU: 0 PID: 173 at lib/refcount.c:28 refcount_warn_saturate+0xcf/0x120\n[   72.533075] Modules linked in: nfsd(OE) nfsv4(OE) nfsv3(OE) nfs(OE) lockd(OE) compat_nfs_ssc(OE) nfs_acl(OE) rpcsec_gss_krb5(OE) auth_rpcgss(OE) rpcrdma(OE) dns_resolver fscache netfs grace rdma_cm iw_cm ib_cm sunrpc(OE) mlx5_ib mlx5_core mlxfw pci_hyperv_intf ib_uverbs ib_core xt_MASQUERADE nf_conntrack_netlink nft_counter xt_addrtype nft_compat br_netfilter bridge stp llc nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set overlay nf_tables nfnetlink crct10dif_pclmul crc32_pclmul ghash_clmulni_intel xfs serio_raw virtio_net virtio_blk net_failover failover fuse [last unloaded: sunrpc]\n[   72.540389] CPU: 0 PID: 173 Comm: kworker/u16:5 Tainted: G           OE     5.15.82-dan #1\n[   72.541511] Hardware name: Red Hat KVM/RHEL-AV, BIOS 1.16.0-3.module+el8.7.0+1084+97b81f61 04/01/2014\n[   72.542717] Workqueue: nfsd4_callbacks nfsd4_run_cb_work [nfsd]\n[   72.543575] RIP: 0010:refcount_warn_saturate+0xcf/0x120\n[   72.544299] Code: 55 00 0f 0b 5d e9 01 50 98 00 80 3d 75 9e 39 08 00 0f 85 74 ff ff ff 48 c7 c7 e8 d1 60 8e c6 05 61 9e 39 08 01 e8 f6 51 55 00 \u003c0f\u003e 0b 5d e9 d9 4f 98 00 80 3d 4b 9e 39 08 00 0f 85 4c ff ff ff 48\n[   72.546666] RSP: 0018:ffffb3f841157cf0 EFLAGS: 00010286\n[   72.547393] RAX: 0000000000000026 RBX: ffff89ac6231d478 RCX: 0000000000000000\n[   72.548324] RDX: ffff89adb7c2c2c0 RSI: ffff89adb7c205c0 RDI: ffff89adb7c205c0\n[   72.549271] RBP: ffffb3f841157cf0 R08: 0000000000000000 R09: c0000000ffefffff\n[   72.550209] R10: 0000000000000001 R11: ffffb3f841157ad0 R12: ffff89ac6231d180\n[   72.551142] R13: ffff89ac6231d478 R14: ffff89ac40c06180 R15: ffff89ac6231d4b0\n[   72.552089] FS:  0000000000000000(0000) GS:ffff89adb7c00000(0000) knlGS:0000000000000000\n[   72.553175] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[   72.553934] CR2: 0000563a310506a8 CR3: 0000000109a66000 CR4: 0000000000350ef0\n[   72.554874] Call Trace:\n[   72.555278]  \u003cTASK\u003e\n[   72.555614]  svc_xprt_put+0xaf/0xe0 [sunrpc]\n[   72.556276]  nfsd4_process_cb_update.isra.11+0xb7/0x410 [nfsd]\n[   72.557087]  ? update_load_avg+0x82/0x610\n[   72.557652]  ? cpuacct_charge+0x60/0x70\n[   72.558212]  ? dequeue_entity+0xdb/0x3e0\n[   72.558765]  ? queued_spin_unlock+0x9/0x20\n[   72.559358]  nfsd4_run_cb_work+0xfc/0x270 [nfsd]\n[   72.560031]  process_one_work+0x1df/0x390\n[   72.560600]  worker_thread+0x37/0x3b0\n[   72.561644]  ? process_one_work+0x390/0x390\n[   72.562247]  kthread+0x12f/0x150\n[   72.562710]  ? set_kthread_struct+0x50/0x50\n[   72.563309]  ret_from_fork+0x22/0x30\n[   72.563818]  \u003c/TASK\u003e\n[   72.564189] ---[ end trace 031117b1c72ec616 ]---\n[   72.566019] list_add corruption. next-\u003eprev should be prev (ffff89ac4977e538), but was ffff89ac4763e018. (next=ffff89ac4763e018).\n[   72.567647] ------------[ cut here ]------------","modified":"2026-10-28T02:31:09.761733752Z","published":"2025-09-18T16:03:47.283Z","related":["SUSE-SU-2025:03613-1","SUSE-SU-2025:03614-1","SUSE-SU-2025:03615-1","SUSE-SU-2025:03626-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3761-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50401.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15fc60aa5bdcf6d5f93000d3d00579fc67632ee0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3bc8edc98bd43540dbe648e4ef91f443d6d20a24"},{"type":"WEB","url":"https://git.kernel.org/stable/c/707bcca9616002d204091ca7c4d1d91151104332"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9b4ae8c42d2ff09ed7c5832ccce5684c55e5ed23"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a472f069ced8601979f53c13c0cf20236074ed46"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c1207219a4bfa50121c9345d5d165470d0a82531"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d843ebd860c58a38e45527e8ec6516059f4c97f3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e2f9f03e4537f3fcc8fd2bdd3248530c3477a371"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fddac3b4578d302ac9e51e7f03a9aae6254ae2a3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50401.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50401"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"69151594c72a1748cf93ae5b5fa68d5084253dce"},{"fixed":"707bcca9616002d204091ca7c4d1d91151104332"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0c4fb76c4e711d9e4e70ddc6732310a17076175d"},{"fixed":"15fc60aa5bdcf6d5f93000d3d00579fc67632ee0"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"22c721560ef24003bcb9c3d9c358841dcfa4e212"},{"fixed":"9b4ae8c42d2ff09ed7c5832ccce5684c55e5ed23"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e8cac2e3067e8587f8271c2177cc5ca924a61b54"},{"fixed":"fddac3b4578d302ac9e51e7f03a9aae6254ae2a3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a4abc6b12eb1f7a533c2e7484cfa555454ff0977"},{"fixed":"c1207219a4bfa50121c9345d5d165470d0a82531"},{"fixed":"a472f069ced8601979f53c13c0cf20236074ed46"},{"fixed":"e2f9f03e4537f3fcc8fd2bdd3248530c3477a371"},{"fixed":"d843ebd860c58a38e45527e8ec6516059f4c97f3"},{"fixed":"3bc8edc98bd43540dbe648e4ef91f443d6d20a24"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.9.229"},{"fixed":"4.9.337"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.14.186"},{"fixed":"4.14.303"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.19.130"},{"fixed":"4.19.270"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.49"},{"fixed":"5.4.229"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.4.229"},{"fixed":"4.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.7.6"},{"fixed":"5.8"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f5a50e848e4509448b8b91536b5d421722bf154b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c745f9ef3c8cbae70556131eaeaf0f64510243b7"}]}],"versions":["v4.9.336","v4.9.335","v4.9.334","v4.9.333","v4.9.332","v4.9.331","v4.9.330","v4.9.329","v4.9.328","v4.9.327","v4.9.326","v4.9.325","v4.9.324","v4.9.323","v4.9.322","v4.9.321","v4.9.320","v4.9.319","v4.9.318","v4.9.317","v4.9.316","v4.9.315","v4.9.314","v4.9.313","v4.9.312","v4.9.311","v4.9.310","v4.9.309","v4.9.308","v4.9.307","v4.9.306","v4.9.305","v4.9.304","v4.9.303","v4.9.302","v4.9.301","v4.9.300","v4.9.299","v4.9.298","v4.9.297","v4.9.296","v4.9.295","v4.9.294","v4.9.293","v4.9.292","v4.9.291","v4.9.290","v4.9.289","v4.9.288","v4.9.287","v4.9.286","v4.9.285","v4.9.284","v4.9.283","v4.9.282","v4.9.281","v4.9.280","v4.9.279","v4.9.278","v4.9.277","v4.9.276","v4.9.275","v4.9.274","v4.9.273","v4.9.272","v4.9.271","v4.9.270","v4.9.269","v4.9.268","v4.9.267","v4.9.266","v4.9.265","v4.9.264","v4.9.263","v4.9.262","v4.9.261","v4.9.260","v4.9.259","v4.9.258","v4.9.257","v4.9.256","v4.9.255","v4.9.254","v4.9.253","v4.9.252"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