CVE-2022-50401 — nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure

On error situation `clp->cl_cb_conn.cb_xprt` should not be given a reference to the xprt otherwise both client cleanup and the error handling path of the caller call to put it. Better to delay handing over the reference to a later branch.

[ 72.530665] refcount_t: underflow; use-after-free. [ 72.531933] WARNING: CPU: 0 PID: 173 at lib/refcount.c:28 refcount_warn_saturate+0xcf/0x120 [ 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] [ 72.540389] CPU: 0 PID: 173 Comm: kworker/u16:5 Tainted: G OE 5.15.82-dan #1 [ 72.541511] Hardware name: Red Hat KVM/RHEL-AV, BIOS 1.16.0-3.module+el8.7.0+1084+97b81f61 04/01/2014 [ 72.542717] Workqueue: nfsd4_callbacks nfsd4_run_cb_work [nfsd] [ 72.543575] RIP: 0010:re…

USN-8725-1 — linux, linux-aws, linux-fips, linux-kvm, linux-lts-xenial vulnerabilities

Affected: Ubuntu:Pro:14.04:LTS: linux-aws, Ubuntu:Pro:14.04:LTS: linux-lts-xenial, Ubuntu:Pro:16.04:LTS: linux, Ubuntu:Pro:16.04:LTS: linux-kvm, Ubuntu:Pro:FIPS:16.04:LTS: linux-fips

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - NVIDIA Tegra memory controller driver; - File systems infrastructure; - Network file system (NFS) server daemon; - OCFS2 file system; - B.A.T.M.A.N. meshing protocol; - Netfilter; - SCTP protocol; (CVE-2022-50401, CVE-2026-43071, CVE-2026-52914, CVE-2026-53002, CVE-2026-53043, CVE-2026-53045, CVE-2026-53224, CVE-2026-53309)

Most recent entries from all

CVE-2022-50401 — nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure

USN-8725-1 — linux, linux-aws, linux-fips, linux-kvm, linux-lts-xenial vulnerabilities