CVE-2022-48974

{"id": "CVE-2022-48974", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-10-21T20:15:09.517", "references": [{"url": "https://git.kernel.org/stable/c/9464d0b68f11a9bc768370c3260ec02b3550447b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d9bf1138a5db419db13bd9fcd3a7178d6bb20f7c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: fix using __this_cpu_add in preemptible\n\nCurrently in nf_conntrack_hash_check_insert(), when it fails in\nnf_ct_ext_valid_pre/post(), NF_CT_STAT_INC() will be called in the\npreemptible context, a call trace can be triggered:\n\n BUG: using __this_cpu_add() in preemptible [00000000] code: conntrack/1636\n caller is nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]\n Call Trace:\n <TASK>\n dump_stack_lvl+0x33/0x46\n check_preemption_disabled+0xc3/0xf0\n nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack]\n ctnetlink_create_conntrack+0x3cd/0x4e0 [nf_conntrack_netlink]\n ctnetlink_new_conntrack+0x1c0/0x450 [nf_conntrack_netlink]\n nfnetlink_rcv_msg+0x277/0x2f0 [nfnetlink]\n netlink_rcv_skb+0x50/0x100\n nfnetlink_rcv+0x65/0x144 [nfnetlink]\n netlink_unicast+0x1ae/0x290\n netlink_sendmsg+0x257/0x4f0\n sock_sendmsg+0x5f/0x70\n\nThis patch is to fix it by changing to use NF_CT_STAT_INC_ATOMIC() for\nnf_ct_ext_valid_pre/post() check in nf_conntrack_hash_check_insert(),\nas well as nf_ct_ext_valid_post() in __nf_conntrack_confirm().\n\nNote that nf_ct_ext_valid_pre() check in __nf_conntrack_confirm() is\nsafe to use NF_CT_STAT_INC(), as it's under local_bh_disable()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: conntrack: correcci\u00f3n al usar __this_cpu_add en preemptible Actualmente en nf_conntrack_hash_check_insert(), cuando fallo en nf_ct_ext_valid_pre/post(), se llamar\u00e1 a NF_CT_STAT_INC() en el contexto preemptible, se puede activar un seguimiento de llamada: ERROR: uso de __this_cpu_add() en preemptible [00000000] c\u00f3digo: conntrack/1636 el llamador es nf_conntrack_hash_check_insert+0x45/0x430 [nf_conntrack] Seguimiento de llamada: dump_stack_lvl+0x33/0x46 check_preemption_disabled+0xc3/0xf0 Este parche es para solucionarlo cambiando para usar NF_CT_STAT_INC_ATOMIC() para la comprobaci\u00f3n de nf_ct_ext_valid_pre/post() en nf_conntrack_hash_check_insert(), as\u00ed como nf_ct_ext_valid_post() en __nf_conntrack_confirm(). Tenga en cuenta que la comprobaci\u00f3n de nf_ct_ext_valid_pre() en __nf_conntrack_confirm() es segura para usar NF_CT_STAT_INC(), ya que se encuentra bajo local_bh_disable()."}], "lastModified": "2024-10-25T15:25:54.433", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5709D44A-ADC7-40C9-BF0A-CF44C4FBDD69", "versionEndExcluding": "6.0.13", "versionStartIncluding": "5.19"}, {"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"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "21718AA4-4056-40F2-968E-BDAA465A7872"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}