CVE-2022-49003

{"id": "CVE-2022-49003", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.0}]}, "published": "2024-10-21T20:15:11.920", "references": [{"url": "https://git.kernel.org/stable/c/5b566d09ab1b975566a53f9c5466ee260d087582", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/787d81d4eb150e443e5d1276c6e8f03cfecc2302", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/899d2a05dc14733cfba6224083c6b0dd5a738590", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix SRCU protection of nvme_ns_head list\n\nWalking the nvme_ns_head siblings list is protected by the head's srcu\nin nvme_ns_head_submit_bio() but not nvme_mpath_revalidate_paths().\nRemoving namespaces from the list also fails to synchronize the srcu.\nConcurrent scan work can therefore cause use-after-frees.\n\nHold the head's srcu lock in nvme_mpath_revalidate_paths() and\nsynchronize with the srcu, not the global RCU, in nvme_ns_remove().\n\nObserved the following panic when making NVMe/RDMA connections\nwith native multipath on the Rocky Linux 8.6 kernel\n(it seems the upstream kernel has the same race condition).\nDisassembly shows the faulting instruction is cmp 0x50(%rdx),%rcx;\ncomputing capacity != get_capacity(ns->disk).\nAddress 0x50 is dereferenced because ns->disk is NULL.\nThe NULL disk appears to be the result of concurrent scan work\nfreeing the namespace (note the log line in the middle of the panic).\n\n[37314.206036] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050\n[37314.206036] nvme0n3: detected capacity change from 0 to 11811160064\n[37314.299753] PGD 0 P4D 0\n[37314.299756] Oops: 0000 [#1] SMP PTI\n[37314.299759] CPU: 29 PID: 322046 Comm: kworker/u98:3 Kdump: loaded Tainted: G W X --------- - - 4.18.0-372.32.1.el8test86.x86_64 #1\n[37314.299762] Hardware name: Dell Inc. PowerEdge R720/0JP31P, BIOS 2.7.0 05/23/2018\n[37314.299763] Workqueue: nvme-wq nvme_scan_work [nvme_core]\n[37314.299783] RIP: 0010:nvme_mpath_revalidate_paths+0x26/0xb0 [nvme_core]\n[37314.299790] Code: 1f 44 00 00 66 66 66 66 90 55 53 48 8b 5f 50 48 8b 83 c8 c9 00 00 48 8b 13 48 8b 48 50 48 39 d3 74 20 48 8d 42 d0 48 8b 50 20 <48> 3b 4a 50 74 05 f0 80 60 70 ef 48 8b 50 30 48 8d 42 d0 48 39 d3\n[37315.058803] RSP: 0018:ffffabe28f913d10 EFLAGS: 00010202\n[37315.121316] RAX: ffff927a077da800 RBX: ffff92991dd70000 RCX: 0000000001600000\n[37315.206704] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff92991b719800\n[37315.292106] RBP: ffff929a6b70c000 R08: 000000010234cd4a R09: c0000000ffff7fff\n[37315.377501] R10: 0000000000000001 R11: ffffabe28f913a30 R12: 0000000000000000\n[37315.462889] R13: ffff92992716600c R14: ffff929964e6e030 R15: ffff92991dd70000\n[37315.548286] FS: 0000000000000000(0000) GS:ffff92b87fb80000(0000) knlGS:0000000000000000\n[37315.645111] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[37315.713871] CR2: 0000000000000050 CR3: 0000002208810006 CR4: 00000000000606e0\n[37315.799267] Call Trace:\n[37315.828515] nvme_update_ns_info+0x1ac/0x250 [nvme_core]\n[37315.892075] nvme_validate_or_alloc_ns+0x2ff/0xa00 [nvme_core]\n[37315.961871] ? __blk_mq_free_request+0x6b/0x90\n[37316.015021] nvme_scan_work+0x151/0x240 [nvme_core]\n[37316.073371] process_one_work+0x1a7/0x360\n[37316.121318] ? create_worker+0x1a0/0x1a0\n[37316.168227] worker_thread+0x30/0x390\n[37316.212024] ? create_worker+0x1a0/0x1a0\n[37316.258939] kthread+0x10a/0x120\n[37316.297557] ? set_kthread_struct+0x50/0x50\n[37316.347590] ret_from_fork+0x35/0x40\n[37316.390360] Modules linked in: nvme_rdma nvme_tcp(X) nvme_fabrics nvme_core netconsole iscsi_tcp libiscsi_tcp dm_queue_length dm_service_time nf_conntrack_netlink br_netfilter bridge stp llc overlay nft_chain_nat ipt_MASQUERADE nf_nat xt_addrtype xt_CT nft_counter xt_state xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_comment xt_multiport nft_compat nf_tables libcrc32c nfnetlink dm_multipath tg3 rpcrdma sunrpc rdma_ucm ib_srpt ib_isert iscsi_target_mod target_core_mod ib_iser libiscsi scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm intel_rapl_msr iTCO_wdt iTCO_vendor_support dcdbas intel_rapl_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ipmi_ssif kvm irqbypass crct10dif_pclmul crc32_pclmul mlx5_ib ghash_clmulni_intel ib_uverbs rapl intel_cstate intel_uncore ib_core ipmi_si joydev mei_me pcspkr ipmi_devintf mei lpc_ich wmi ipmi_msghandler acpi_power_meter ex\n---truncated---"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nvme: se corrige la protecci\u00f3n SRCU de la lista nvme_ns_head El recorrido por la lista de hermanos nvme_ns_head est\u00e1 protegido por el srcu del cabezal en nvme_ns_head_submit_bio() pero no por nvme_mpath_revalidate_paths(). La eliminaci\u00f3n de espacios de nombres de la lista tambi\u00e9n fallo al sincronizar el srcu. Por lo tanto, el trabajo de escaneo simult\u00e1neo puede causar use-after-free. Mantenga el bloqueo del srcu del cabezal en nvme_mpath_revalidate_paths() y sincronice con el srcu, no con el RCU global, en nvme_ns_remove(). Se observ\u00f3 el siguiente p\u00e1nico al realizar conexiones NVMe/RDMA con multipath nativo en el kernel Rocky Linux 8.6 (parece que el kernel ascendente tiene la misma condici\u00f3n de ejecuci\u00f3n). El desensamblaje muestra que la instrucci\u00f3n que fallo es cmp 0x50(%rdx),%rcx; capacidad de c\u00f3mputo != get_capacity(ns-&gt;disk). La direcci\u00f3n 0x50 est\u00e1 desreferenciada porque ns-&gt;disk es NULL. El disco NULL parece ser el resultado de un trabajo de escaneo simult\u00e1neo que libera el espacio de nombres (observe la l\u00ednea de registro en el medio del p\u00e1nico). [37314.206036] ERROR: no se puede manejar la desreferencia del puntero NULL del n\u00facleo en 0000000000000050 [37314.206036] nvme0n3: se detect\u00f3 un cambio de capacidad de 0 a 11811160064 [37314.299753] PGD 0 P4D 0 [37314.299756] Oops: 0000 [#1] SMP PTI [37314.299759] CPU: 29 PID: 322046 Comm: kworker/u98:3 Kdump: cargado Tainted: GWX --------- - - 4.18.0-372.32.1.el8test86.x86_64 #1 [37314.299762] Nombre del hardware: Dell Inc. PowerEdge R720/0JP31P, BIOS 2.7.0 23/05/2018 [37314.299763] Cola de trabajo: nvme-wq nvme_scan_work [nvme_core] [37314.299783] RIP: 0010:nvme_mpath_revalidate_paths+0x26/0xb0 [nvme_core] [37314.299790] C\u00f3digo: 1f 44 00 00 66 66 66 66 90 55 53 48 8b 5f 50 48 8b 83 c8 c9 00 00 48 8b 13 48 8b 48 50 48 39 d3 74 20 48 8d 42 d0 48 8b 50 20 &lt;48&gt; 3b 4a 50 74 05 f0 80 60 70 ef 48 8b 50 30 48 8d 42 d0 48 39 d3 [37315.058803] RSP: 0018:ffffabe28f913d10 EFLAGS: 00010202 [37315.121316] RAX: ffff927a077da800 RBX: ffff92991dd70000 RCX: 0000000001600000 [37315.206704] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff92991b719800 [37315.292106] RBP: ffff929a6b70c000 R08: 000000010234cd4a R09: c0000000ffff7fff [37315.377501] R10: 0000000000000001 R11: ffffabe28f913a30 R12: 000000000000000 [37315.462889] R13: ffff92992716600c R14: ffff929964e6e030 R15: ffff92991dd70000 [37315.548286] FS: 0000000000000000(0000) GS:ffff92b87fb80000(0000) knlGS:0000000000000000 [37315.645111] CS: 0010 DS: 0000 ES: 0000 CR0: 000000080050033 [37315.713871] CR2: 000000000000050 CR3: 0000002208810006 CR4: 00000000000606e0 [37315.799267] Seguimiento de llamadas: [37315.828515] nvme_update_ns_info+0x1ac/0x250 [n\u00facleo_nvme] [37315.892075] nvme_validate_or_alloc_ns+0x2ff/0xa00 [n\u00facleo_nvme] [37315.961871] ? __blk_mq_free_request+0x6b/0x90 [37316.015021] nvme_scan_work+0x151/0x240 [n\u00facleo_nvme] [37316.073371] process_one_work+0x1a7/0x360 [37316.121318] ? crear_trabajador+0x1a0/0x1a0 [37316.168227] subproceso_trabajador+0x30/0x390 [37316.212024] ? crear_trabajador+0x1a0/0x1a0 [37316.258939] kthread+0x10a/0x120 [37316.297557] ? M\u00f3dulos vinculados en: nvme_rdma nvme_tcp(X) nvme_fabrics nvme_core netconsole iscsi_tcp libiscsi_tcp dm_queue_length dm_service_time nf_conntrack_netlink br_netfilter bridge stp llc superposici\u00f3n nft_chain_nat ipt_MASQUERADE nf_nat xt_addrtype xt_CT nft_counter xt_state xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_comment xt_multiport nft_compat nf_tables libcrc32c nfnetlink dm_multipath tg3 rpcrdma sunrpc rdma_ucm ib_srpt ib_isert iscsi_target_mod target_core_mod ib_iser libiscsi scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm intel_rapl_msr iTCO_wdt iTCO_vendor_support dcdbas intel_rapl_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel ipmi_ssif kvm irqbypass crct10dif_pclmul crc32_pclmul mlx5_ib ghash_clmulni_intel ib_uverbs rapl intel_cstate intel_uncore ib_core ipmi_si joydev mei_me---truncado---"}], "lastModified": "2024-10-25T14:12:59.897", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C947DE0F-3C67-410C-9D9B-DCBE9D8ACB8D", "versionEndExcluding": "5.15.82", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6D56E90-F3EE-413D-B3E2-B518932F0C7D", "versionEndExcluding": "6.0.12", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "35B26BE4-43A6-4A36-A7F6-5B3F572D9186"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3FFFB0B3-930D-408A-91E2-BAE0C2715D80"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8535320E-A0DB-4277-800E-D0CE5BBA59E8"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}