CVE-2024-50046 (GCVE-0-2024-50046)

Vulnerability from cvelistv5 – Published: 2024-10-21 19:39 – Updated: 2026-10-15 00:56
VLAI
Title
NFSv4: Prevent NULL-pointer dereference in nfs42_complete_copies()
Summary
In the Linux kernel, the following vulnerability has been resolved: NFSv4: Prevent NULL-pointer dereference in nfs42_complete_copies() On the node of an NFS client, some files saved in the mountpoint of the NFS server were copied to another location of the same NFS server. Accidentally, the nfs42_complete_copies() got a NULL-pointer dereference crash with the following syslog: [232064.838881] NFSv4: state recovery failed for open file nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116 [232064.839360] NFSv4: state recovery failed for open file nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116 [232066.588183] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000058 [232066.588586] Mem abort info: [232066.588701] ESR = 0x0000000096000007 [232066.588862] EC = 0x25: DABT (current EL), IL = 32 bits [232066.589084] SET = 0, FnV = 0 [232066.589216] EA = 0, S1PTW = 0 [232066.589340] FSC = 0x07: level 3 translation fault [232066.589559] Data abort info: [232066.589683] ISV = 0, ISS = 0x00000007 [232066.589842] CM = 0, WnR = 0 [232066.589967] user pgtable: 64k pages, 48-bit VAs, pgdp=00002000956ff400 [232066.590231] [0000000000000058] pgd=08001100ae100003, p4d=08001100ae100003, pud=08001100ae100003, pmd=08001100b3c00003, pte=0000000000000000 [232066.590757] Internal error: Oops: 96000007 [#1] SMP [232066.590958] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm vhost_net vhost vhost_iotlb tap tun ipt_rpfilter xt_multiport ip_set_hash_ip ip_set_hash_net xfrm_interface xfrm6_tunnel tunnel4 tunnel6 esp4 ah4 wireguard libcurve25519_generic veth xt_addrtype xt_set nf_conntrack_netlink ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_bitmap_port ip_set_hash_ipport dummy ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs iptable_filter sch_ingress nfnetlink_cttimeout vport_gre ip_gre ip_tunnel gre vport_geneve geneve vport_vxlan vxlan ip6_udp_tunnel udp_tunnel openvswitch nf_conncount dm_round_robin dm_service_time dm_multipath xt_nat xt_MASQUERADE nft_chain_nat nf_nat xt_mark xt_conntrack xt_comment nft_compat nft_counter nf_tables nfnetlink ocfs2 ocfs2_nodemanager ocfs2_stackglue iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ipmi_ssif nbd overlay 8021q garp mrp bonding tls rfkill sunrpc ext4 mbcache jbd2 [232066.591052] vfat fat cas_cache cas_disk ses enclosure scsi_transport_sas sg acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler ip_tables vfio_pci vfio_pci_core vfio_virqfd vfio_iommu_type1 vfio dm_mirror dm_region_hash dm_log dm_mod nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc fuse xfs libcrc32c ast drm_vram_helper qla2xxx drm_kms_helper syscopyarea crct10dif_ce sysfillrect ghash_ce sysimgblt sha2_ce fb_sys_fops cec sha256_arm64 sha1_ce drm_ttm_helper ttm nvme_fc igb sbsa_gwdt nvme_fabrics drm nvme_core i2c_algo_bit i40e scsi_transport_fc megaraid_sas aes_neon_bs [232066.596953] CPU: 6 PID: 4124696 Comm: 10.253.166.125- Kdump: loaded Not tainted 5.15.131-9.cl9_ocfs2.aarch64 #1 [232066.597356] Hardware name: Great Wall .\x93\x8e...RF6260 V5/GWMSSE2GL1T, BIOS T656FBE_V3.0.18 2024-01-06 [232066.597721] pstate: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [232066.598034] pc : nfs4_reclaim_open_state+0x220/0x800 [nfsv4] [232066.598327] lr : nfs4_reclaim_open_state+0x12c/0x800 [nfsv4] [232066.598595] sp : ffff8000f568fc70 [232066.598731] x29: ffff8000f568fc70 x28: 0000000000001000 x27: ffff21003db33000 [232066.599030] x26: ffff800005521ae0 x25: ffff0100f98fa3f0 x24: 0000000000000001 [232066.599319] x23: ffff800009920008 x22: ffff21003db33040 x21: ffff21003db33050 [232066.599628] x20: ffff410172fe9e40 x19: ffff410172fe9e00 x18: 0000000000000000 [232066.599914] x17: 0000000000000000 x16: 0000000000000004 x15: 0000000000000000 [232066.600195] x14: 0000000000000000 x13: ffff800008e685a8 x12: 00000000eac0c6e6 [232066.600498] x11: 00000000000000 ---truncated---
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:24 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0e65a32c8a569db363048e17a708b1a0913adbef , < f892165c564e3aab272948dbb556cc20e290c55a (git)
Affected: 0e65a32c8a569db363048e17a708b1a0913adbef , < 584c019baedddec3fd634053e8fb2d8836108d38 (git)
Affected: 0e65a32c8a569db363048e17a708b1a0913adbef , < 632344b9efa064ca737bfcdaaaced59fd5f18ae9 (git)
Affected: 0e65a32c8a569db363048e17a708b1a0913adbef , < fca41e5fa4914d12b2136c25f9dad69520b52683 (git)
Affected: 0e65a32c8a569db363048e17a708b1a0913adbef , < ef9189bb15dcbe7ed3f3515aaa6fc8bf7483960d (git)
Affected: 0e65a32c8a569db363048e17a708b1a0913adbef , < a848c29e3486189aaabd5663bc11aea50c5bd144 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.227 , ≤ 5.10.* (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.57 , ≤ 6.6.* (semver)
Unaffected: 6.11.4 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < V1.1.1 (custom)
guessed Create a notification for this product.
Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.2 (custom)
guessed Create a notification for this product.
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Affected: 0 , < V3.2 (custom)
guessed Create a notification for this product.
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.2 (custom)
guessed Create a notification for this product.
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: Prevent NULL-pointer dereference in nfs42_complete_copies()\n\nOn the node of an NFS client, some files saved in the mountpoint of the\nNFS server were copied to another location of the same NFS server.\nAccidentally, the nfs42_complete_copies() got a NULL-pointer dereference\ncrash with the following syslog:\n\n[232064.838881] NFSv4: state recovery failed for open file nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116\n[232064.839360] NFSv4: state recovery failed for open file nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116\n[232066.588183] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000058\n[232066.588586] Mem abort info:\n[232066.588701]   ESR = 0x0000000096000007\n[232066.588862]   EC = 0x25: DABT (current EL), IL = 32 bits\n[232066.589084]   SET = 0, FnV = 0\n[232066.589216]   EA = 0, S1PTW = 0\n[232066.589340]   FSC = 0x07: level 3 translation fault\n[232066.589559] Data abort info:\n[232066.589683]   ISV = 0, ISS = 0x00000007\n[232066.589842]   CM = 0, WnR = 0\n[232066.589967] user pgtable: 64k pages, 48-bit VAs, pgdp=00002000956ff400\n[232066.590231] [0000000000000058] pgd=08001100ae100003, p4d=08001100ae100003, pud=08001100ae100003, pmd=08001100b3c00003, pte=0000000000000000\n[232066.590757] Internal error: Oops: 96000007 [#1] SMP\n[232066.590958] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm vhost_net vhost vhost_iotlb tap tun ipt_rpfilter xt_multiport ip_set_hash_ip ip_set_hash_net xfrm_interface xfrm6_tunnel tunnel4 tunnel6 esp4 ah4 wireguard libcurve25519_generic veth xt_addrtype xt_set nf_conntrack_netlink ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_bitmap_port ip_set_hash_ipport dummy ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs iptable_filter sch_ingress nfnetlink_cttimeout vport_gre ip_gre ip_tunnel gre vport_geneve geneve vport_vxlan vxlan ip6_udp_tunnel udp_tunnel openvswitch nf_conncount dm_round_robin dm_service_time dm_multipath xt_nat xt_MASQUERADE nft_chain_nat nf_nat xt_mark xt_conntrack xt_comment nft_compat nft_counter nf_tables nfnetlink ocfs2 ocfs2_nodemanager ocfs2_stackglue iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ipmi_ssif nbd overlay 8021q garp mrp bonding tls rfkill sunrpc ext4 mbcache jbd2\n[232066.591052]  vfat fat cas_cache cas_disk ses enclosure scsi_transport_sas sg acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler ip_tables vfio_pci vfio_pci_core vfio_virqfd vfio_iommu_type1 vfio dm_mirror dm_region_hash dm_log dm_mod nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc fuse xfs libcrc32c ast drm_vram_helper qla2xxx drm_kms_helper syscopyarea crct10dif_ce sysfillrect ghash_ce sysimgblt sha2_ce fb_sys_fops cec sha256_arm64 sha1_ce drm_ttm_helper ttm nvme_fc igb sbsa_gwdt nvme_fabrics drm nvme_core i2c_algo_bit i40e scsi_transport_fc megaraid_sas aes_neon_bs\n[232066.596953] CPU: 6 PID: 4124696 Comm: 10.253.166.125- Kdump: loaded Not tainted 5.15.131-9.cl9_ocfs2.aarch64 #1\n[232066.597356] Hardware name: Great Wall .\\x93\\x8e...RF6260 V5/GWMSSE2GL1T, BIOS T656FBE_V3.0.18 2024-01-06\n[232066.597721] pstate: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[232066.598034] pc : nfs4_reclaim_open_state+0x220/0x800 [nfsv4]\n[232066.598327] lr : nfs4_reclaim_open_state+0x12c/0x800 [nfsv4]\n[232066.598595] sp : ffff8000f568fc70\n[232066.598731] x29: ffff8000f568fc70 x28: 0000000000001000 x27: ffff21003db33000\n[232066.599030] x26: ffff800005521ae0 x25: ffff0100f98fa3f0 x24: 0000000000000001\n[232066.599319] x23: ffff800009920008 x22: ffff21003db33040 x21: ffff21003db33050\n[232066.599628] x20: ffff410172fe9e40 x19: ffff410172fe9e00 x18: 0000000000000000\n[232066.599914] x17: 0000000000000000 x16: 0000000000000004 x15: 0000000000000000\n[232066.600195] x14: 0000000000000000 x13: ffff800008e685a8 x12: 00000000eac0c6e6\n[232066.600498] x11: 00000000000000\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The type-confused dereference executes in the NFS client\u0027s state-manager and CB_OFFLOAD callback paths, both driven entirely by remote NFS server RPCs \u2014 the server chooses when to force state recovery (STALE_CLIENTID/BAD_SESSION/EXPIRED or a reboot) and supplies the `wr_count`/write-verifier bytes that land in the misinterpreted fields. A malicious, compromised, or on-path (auth_sys, no krb5i/p) NFS server reaches this purely over the network.\nAC:L - The attacker controls both preconditions \u2014 withholding CB_OFFLOAD keeps async inter-mount copies pending indefinitely, and returning a stale-clientid/expired error forces reclaim on demand \u2014 with no unwinnable race and no memory layout the attacker cannot influence. The condition is common enough that the reporter hit it accidentally during ordinary `cp` workload.\nPR:N - The remote NFS server (or MITM) holds no credentials or privileges on the victim client, and the copy_file_range that arms the list is routine unprivileged workload rather than a privileged operation. No local account on the client is needed.\nUI:N - copy_file_range across NFS mounts is ordinary background activity on any NFS client (coreutils `cp` issues it automatically), and an unprivileged local user can issue it themselves; no distinct victim action is required at exploit time.\nS:U - The corruption and the crash are confined to kernel memory within the same security authority \u2014 no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `copy-\u003eparent_dst_state` is read at `real+144`, past the end of the 136-byte object into non-zeroed slab slack, and then dereferenced as a `struct nfs4_state *`; with standard kmalloc-192 grooming this becomes an attacker-chosen arbitrary-address read, and the shifted accesses also expose live object fields.\nI:H - This is a container_of type confusion with write effects: `copy-\u003eflags = 1` overwrites a live object\u0027s `parent_dst_state` pointer, and `complete()` on the skewed completion performs `list_del_init()` on `count`/`verf.verifier` \u2014 64-bit values written directly from the server\u0027s CB_OFFLOAD reply \u2014 giving a classic remote-fed unlink write primitive.\nA:H - A confirmed kernel oops in the `nfs4_state_manager` kthread is in the commit\u0027s own crash log, and the misaligned `raw_spin_lock_irqsave` on a never-zero word spins forever with IRQs disabled while holding `clp-\u003ecl_lock`, hanging the client."
            }
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        "dateUpdated": "2026-08-05T11:41:15.082Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f892165c564e3aab272948dbb556cc20e290c55a"
        },
        {
          "url": "https://git.kernel.org/stable/c/584c019baedddec3fd634053e8fb2d8836108d38"
        },
        {
          "url": "https://git.kernel.org/stable/c/632344b9efa064ca737bfcdaaaced59fd5f18ae9"
        },
        {
          "url": "https://git.kernel.org/stable/c/fca41e5fa4914d12b2136c25f9dad69520b52683"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef9189bb15dcbe7ed3f3515aaa6fc8bf7483960d"
        },
        {
          "url": "https://git.kernel.org/stable/c/a848c29e3486189aaabd5663bc11aea50c5bd144"
        }
      ],
      "title": "NFSv4: Prevent NULL-pointer dereference in nfs42_complete_copies()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50046",
    "datePublished": "2024-10-21T19:39:43.780Z",
    "dateReserved": "2024-10-21T12:17:06.071Z",
    "dateUpdated": "2026-10-15T00:56:56.626Z",
    "state": "PUBLISHED"
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: Prevent NULL-pointer dereference in nfs42_complete_copies()\n\nOn the node of an NFS client, some files saved in the mountpoint of the\nNFS server were copied to another location of the same NFS server.\nAccidentally, the nfs42_complete_copies() got a NULL-pointer dereference\ncrash with the following syslog:\n\n[232064.838881] NFSv4: state recovery failed for open file nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116\n[232064.839360] NFSv4: state recovery failed for open file nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116\n[232066.588183] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000058\n[232066.588586] Mem abort info:\n[232066.588701]   ESR = 0x0000000096000007\n[232066.588862]   EC = 0x25: DABT (current EL), IL = 32 bits\n[232066.589084]   SET = 0, FnV = 0\n[232066.589216]   EA = 0, S1PTW = 0\n[232066.589340]   FSC = 0x07: level 3 translation fault\n[232066.589559] Data abort info:\n[232066.589683]   ISV = 0, ISS = 0x00000007\n[232066.589842]   CM = 0, WnR = 0\n[232066.589967] user pgtable: 64k pages, 48-bit VAs, pgdp=00002000956ff400\n[232066.590231] [0000000000000058] pgd=08001100ae100003, p4d=08001100ae100003, pud=08001100ae100003, pmd=08001100b3c00003, pte=0000000000000000\n[232066.590757] Internal error: Oops: 96000007 [#1] SMP\n[232066.590958] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm vhost_net vhost vhost_iotlb tap tun ipt_rpfilter xt_multiport ip_set_hash_ip ip_set_hash_net xfrm_interface xfrm6_tunnel tunnel4 tunnel6 esp4 ah4 wireguard libcurve25519_generic veth xt_addrtype xt_set nf_conntrack_netlink ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_bitmap_port ip_set_hash_ipport dummy ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs iptable_filter sch_ingress nfnetlink_cttimeout vport_gre ip_gre ip_tunnel gre vport_geneve geneve vport_vxlan vxlan ip6_udp_tunnel udp_tunnel openvswitch nf_conncount dm_round_robin dm_service_time dm_multipath xt_nat xt_MASQUERADE nft_chain_nat nf_nat xt_mark xt_conntrack xt_comment nft_compat nft_counter nf_tables nfnetlink ocfs2 ocfs2_nodemanager ocfs2_stackglue iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ipmi_ssif nbd overlay 8021q garp mrp bonding tls rfkill sunrpc ext4 mbcache jbd2\n[232066.591052]  vfat fat cas_cache cas_disk ses enclosure scsi_transport_sas sg acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler ip_tables vfio_pci vfio_pci_core vfio_virqfd vfio_iommu_type1 vfio dm_mirror dm_region_hash dm_log dm_mod nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc fuse xfs libcrc32c ast drm_vram_helper qla2xxx drm_kms_helper syscopyarea crct10dif_ce sysfillrect ghash_ce sysimgblt sha2_ce fb_sys_fops cec sha256_arm64 sha1_ce drm_ttm_helper ttm nvme_fc igb sbsa_gwdt nvme_fabrics drm nvme_core i2c_algo_bit i40e scsi_transport_fc megaraid_sas aes_neon_bs\n[232066.596953] CPU: 6 PID: 4124696 Comm: 10.253.166.125- Kdump: loaded Not tainted 5.15.131-9.cl9_ocfs2.aarch64 #1\n[232066.597356] Hardware name: Great Wall .\\x93\\x8e...RF6260 V5/GWMSSE2GL1T, BIOS T656FBE_V3.0.18 2024-01-06\n[232066.597721] pstate: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[232066.598034] pc : nfs4_reclaim_open_state+0x220/0x800 [nfsv4]\n[232066.598327] lr : nfs4_reclaim_open_state+0x12c/0x800 [nfsv4]\n[232066.598595] sp : ffff8000f568fc70\n[232066.598731] x29: ffff8000f568fc70 x28: 0000000000001000 x27: ffff21003db33000\n[232066.599030] x26: ffff800005521ae0 x25: ffff0100f98fa3f0 x24: 0000000000000001\n[232066.599319] x23: ffff800009920008 x22: ffff21003db33040 x21: ffff21003db33050\n[232066.599628] x20: ffff410172fe9e40 x19: ffff410172fe9e00 x18: 0000000000000000\n[232066.599914] x17: 0000000000000000 x16: 0000000000000004 x15: 0000000000000000\n[232066.600195] x14: 0000000000000000 x13: ffff800008e685a8 x12: 00000000eac0c6e6\n[232066.600498] x11: 00000000000000\n---truncated---"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSv4: Evitar la desreferencia de puntero NULL en nfs42_complete_copies() En el nodo de un cliente NFS, algunos archivos guardados en el punto de montaje del servidor NFS se copiaron a otra ubicaci\u00f3n del mismo servidor NFS. Accidentalmente, nfs42_complete_copies() tuvo un fallo por desreferencia de puntero NULL con el siguiente syslog: [232064.838881] NFSv4: la recuperaci\u00f3n de estado fall\u00f3 para el archivo abierto nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116 [232064.839360] NFSv4: la recuperaci\u00f3n de estado fall\u00f3 para el archivo abierto nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116 [232066.588183] No se puede manejar la desreferencia de puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000058 [232066.588586] Informaci\u00f3n de cancelaci\u00f3n de memoria: [232066.588701] ESR = 0x0000000096000007 [232066.588862] EC = 0x25: DABT (EL actual), IL = 32 bits [232066.589084] SET = 0, FnV = 0 [232066.589216] EA = 0, S1PTW = 0 [232066.589340] FSC = 0x07: error de traducci\u00f3n de nivel 3 [232066.589559] Informaci\u00f3n de cancelaci\u00f3n de datos: [232066.589683] ISV = 0, ISS = 0x00000007 [232066.589842] CM = 0, WnR = 0 [232066.589967] usuario pgtable: 64k p\u00e1ginas, VA de 48 bits, pgdp=00002000956ff400 [232066.590231] [0000000000000058] pgd=08001100ae100003, p4d=08001100ae100003, pud=08001100ae100003, pmd=08001100b3c00003, pte=000000000000000 [232066.590757] Error interno: Oops: 96000007 [#1] SMP [232066.590958] M\u00f3dulos vinculados en: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm vhost_net vhost vhost_iotlb tap tun ipt_rpfilter xt_multiport ip_set_hash_ip ip_set_hash_net xfrm_interface xfrm6_tunnel tunnel4 tunnel6 esp4 ah4 wireguard libcurve25519_generic veth xt_addrtype xt_set nf_conntrack_netlink ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_bitmap_port ip_set_hash_ipport conjunto de ip ficticio ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs iptable_filter sch_ingress nfnetlink_cttimeout vport_gre ip_gre ip_tunnel gre vport_geneve geneve vport_vxlan vxlan ip6_udp_tunnel udp_tunnel openvswitch nf_conncount dm_round_robin dm_service_time dm_multipath xt_nat xt_MASQUERADE nft_chain_nat nf_nat xt_mark xt_conntrack xt_comment nft_compat nft_counter nf_tables nfnetlink ocfs2 ocfs2_nodemanager ocfs2_stackglue iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ipmi_ssif nbd overlay 8021q garp mrp enlace tls rfkill sunrpc ext4 mbcache jbd2 [232066.591052] vfat fat cas_cache cas_disk ses enclosure scsi_transport_sas sg acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler ip_tables vfio_pci vfio_pci_core vfio_virqfd vfio_iommu_type1 vfio dm_mirror dm_region_hash dm_log dm_mod nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter puente stp llc fuse xfs libcrc32c ast drm_vram_helper qla2xxx drm_kms_helper syscopyarea crct10dif_ce sysfillrect ghash_ce sysimgblt sha2_ce fb_sys_fops cec sha256_arm64 sha1_ce drm_ttm_helper ttm nvme_fc igb sbsa_gwdt nvme_fabrics drm nvme_core i2c_algo_bit i40e scsi_transport_fc megaraid_sas aes_neon_bs [232066.596953] CPU: 6 PID: 4124696 Comm: 10.253.166.125- Kdump: cargado No contaminado 5.15.131-9.cl9_ocfs2.aarch64 #1 [232066.597356] Nombre del hardware: Great Wall .\\x93\\x8e...RF6260 V5/GWMSSE2GL1T, BIOS T656FBE_V3.0.18 2024-01-06 [232066.597721] estado de la p\u00e1gina: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [232066.598034] equipo: nfs4_reclaim_open_state+0x220/0x800 [nfsv4] [232066.598327] estado de la p\u00e1gina: nfs4_reclaim_open_state+0x12c/0x800 [nfsv4] [232066.598595] servidor de arranque: ffff8000f568fc70 [232066.598731] x29: ffff8000f568fc70 x28: 0000000000001000 x27: ffff21003db33000 [232066.599030] x26: ffff800005521ae0 x25: 0 x24: 0000000000000001 [232066.599319] x23: ffff800009920008 x22: ffff21003db33040 x21: ffff21003db33050 [232066.599628] x20: ffff410172fe9e40 x19: ffff410172fe9e00 x18: 0000000000000000 [232066.599914] x17: 0000000000000000 x16: 0000000000000004 x15: 0000000000000000 [232066.6001---truncado---"
          }
        ],
        "id": "CVE-2024-50046",
        "lastModified": "2026-10-15T01:19:06.460",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
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          "descriptions": [
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              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: Prevent NULL-pointer dereference in nfs42_complete_copies()\n\nOn the node of an NFS client, some files saved in the mountpoint of the\nNFS server were copied to another location of the same NFS server.\nAccidentally, the nfs42_complete_copies() got a NULL-pointer dereference\ncrash with the following syslog:\n\n[232064.838881] NFSv4: state recovery failed for open file nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116\n[232064.839360] NFSv4: state recovery failed for open file nfs/pvc-12b5200d-cd0f-46a3-b9f0-af8f4fe0ef64.qcow2, error = -116\n[232066.588183] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000058\n[232066.588586] Mem abort info:\n[232066.588701]   ESR = 0x0000000096000007\n[232066.588862]   EC = 0x25: DABT (current EL), IL = 32 bits\n[232066.589084]   SET = 0, FnV = 0\n[232066.589216]   EA = 0, S1PTW = 0\n[232066.589340]   FSC = 0x07: level 3 translation fault\n[232066.589559] Data abort info:\n[232066.589683]   ISV = 0, ISS = 0x00000007\n[232066.589842]   CM = 0, WnR = 0\n[232066.589967] user pgtable: 64k pages, 48-bit VAs, pgdp=00002000956ff400\n[232066.590231] [0000000000000058] pgd=08001100ae100003, p4d=08001100ae100003, pud=08001100ae100003, pmd=08001100b3c00003, pte=0000000000000000\n[232066.590757] Internal error: Oops: 96000007 [#1] SMP\n[232066.590958] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm vhost_net vhost vhost_iotlb tap tun ipt_rpfilter xt_multiport ip_set_hash_ip ip_set_hash_net xfrm_interface xfrm6_tunnel tunnel4 tunnel6 esp4 ah4 wireguard libcurve25519_generic veth xt_addrtype xt_set nf_conntrack_netlink ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_bitmap_port ip_set_hash_ipport dummy ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs iptable_filter sch_ingress nfnetlink_cttimeout vport_gre ip_gre ip_tunnel gre vport_geneve geneve vport_vxlan vxlan ip6_udp_tunnel udp_tunnel openvswitch nf_conncount dm_round_robin dm_service_time dm_multipath xt_nat xt_MASQUERADE nft_chain_nat nf_nat xt_mark xt_conntrack xt_comment nft_compat nft_counter nf_tables nfnetlink ocfs2 ocfs2_nodemanager ocfs2_stackglue iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ipmi_ssif nbd overlay 8021q garp mrp bonding tls rfkill sunrpc ext4 mbcache jbd2\n[232066.591052]  vfat fat cas_cache cas_disk ses enclosure scsi_transport_sas sg acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler ip_tables vfio_pci vfio_pci_core vfio_virqfd vfio_iommu_type1 vfio dm_mirror dm_region_hash dm_log dm_mod nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc fuse xfs libcrc32c ast drm_vram_helper qla2xxx drm_kms_helper syscopyarea crct10dif_ce sysfillrect ghash_ce sysimgblt sha2_ce fb_sys_fops cec sha256_arm64 sha1_ce drm_ttm_helper ttm nvme_fc igb sbsa_gwdt nvme_fabrics drm nvme_core i2c_algo_bit i40e scsi_transport_fc megaraid_sas aes_neon_bs\n[232066.596953] CPU: 6 PID: 4124696 Comm: 10.253.166.125- Kdump: loaded Not tainted 5.15.131-9.cl9_ocfs2.aarch64 #1\n[232066.597356] Hardware name: Great Wall .\\x93\\x8e...RF6260 V5/GWMSSE2GL1T, BIOS T656FBE_V3.0.18 2024-01-06\n[232066.597721] pstate: 20400009 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[232066.598034] pc : nfs4_reclaim_open_state+0x220/0x800 [nfsv4]\n[232066.598327] lr : nfs4_reclaim_open_state+0x12c/0x800 [nfsv4]\n[232066.598595] sp : ffff8000f568fc70\n[232066.598731] x29: ffff8000f568fc70 x28: 0000000000001000 x27: ffff21003db33000\n[232066.599030] x26: ffff800005521ae0 x25: ffff0100f98fa3f0 x24: 0000000000000001\n[232066.599319] x23: ffff800009920008 x22: ffff21003db33040 x21: ffff21003db33050\n[232066.599628] x20: ffff410172fe9e40 x19: ffff410172fe9e00 x18: 0000000000000000\n[232066.599914] x17: 0000000000000000 x16: 0000000000000004 x15: 0000000000000000\n[232066.600195] x14: 0000000000000000 x13: ffff800008e685a8 x12: 00000000eac0c6e6\n[232066.600498] x11: 00000000000000\n---truncated---"
            }
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          "metrics": [
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                "baseSeverity": "CRITICAL",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
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              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:N - The type-confused dereference executes in the NFS client\u0027s state-manager and CB_OFFLOAD callback paths, both driven entirely by remote NFS server RPCs \u2014 the server chooses when to force state recovery (STALE_CLIENTID/BAD_SESSION/EXPIRED or a reboot) and supplies the `wr_count`/write-verifier bytes that land in the misinterpreted fields. A malicious, compromised, or on-path (auth_sys, no krb5i/p) NFS server reaches this purely over the network.\nAC:L - The attacker controls both preconditions \u2014 withholding CB_OFFLOAD keeps async inter-mount copies pending indefinitely, and returning a stale-clientid/expired error forces reclaim on demand \u2014 with no unwinnable race and no memory layout the attacker cannot influence. The condition is common enough that the reporter hit it accidentally during ordinary `cp` workload.\nPR:N - The remote NFS server (or MITM) holds no credentials or privileges on the victim client, and the copy_file_range that arms the list is routine unprivileged workload rather than a privileged operation. No local account on the client is needed.\nUI:N - copy_file_range across NFS mounts is ordinary background activity on any NFS client (coreutils `cp` issues it automatically), and an unprivileged local user can issue it themselves; no distinct victim action is required at exploit time.\nS:U - The corruption and the crash are confined to kernel memory within the same security authority \u2014 no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `copy-\u003eparent_dst_state` is read at `real+144`, past the end of the 136-byte object into non-zeroed slab slack, and then dereferenced as a `struct nfs4_state *`; with standard kmalloc-192 grooming this becomes an attacker-chosen arbitrary-address read, and the shifted accesses also expose live object fields.\nI:H - This is a container_of type confusion with write effects: `copy-\u003eflags = 1` overwrites a live object\u0027s `parent_dst_state` pointer, and `complete()` on the skewed completion performs `list_del_init()` on `count`/`verf.verifier` \u2014 64-bit values written directly from the server\u0027s CB_OFFLOAD reply \u2014 giving a classic remote-fed unlink write primitive.\nA:H - A confirmed kernel oops in the `nfs4_state_manager` kthread is in the commit\u0027s own crash log, and the misaligned `raw_spin_lock_irqsave` on a never-zero word spins forever with IRQs disabled while holding `clp-\u003ecl_lock`, hanging the client."
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            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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              "url": "https://git.kernel.org/stable/c/a848c29e3486189aaabd5663bc11aea50c5bd144"
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        "assignerShortName": "Linux",
        "cveId": "CVE-2024-50046",
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        "dateReserved": "2024-10-21T12:17:06.071Z",
        "dateUpdated": "2026-10-15T00:56:56.626Z",
        "state": "PUBLISHED"
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  }
}



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Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.