CVE-2022-48976

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/netfilter/nf_flow_table_offload.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a220a11fda012fba506b35929672374c2723ae6d", "status": "affected", "version": "b038177636f83bbf87c2b238706474145dd2cd04", "versionType": "git"}, {"lessThan": "a81047154e7ce4eb8769d5d21adcbc9693542a79", "status": "affected", "version": "b038177636f83bbf87c2b238706474145dd2cd04", "versionType": "git"}, {"status": "affected", "version": "5345d78ae64d5a760c211cd2da995dc71c5b29e4", "versionType": "git"}, {"lessThan": "5.16", "status": "affected", "version": "5.15.157", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/netfilter/nf_flow_table_offload.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.0.*", "status": "unaffected", "version": "6.0.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3FC10E8F-D0FF-45C4-A8F5-7ABB6F91A19E", "versionEndExcluding": "6.0.13", "versionStartIncluding": "5.15.157", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*", "matchCriteriaId": "8B3CE743-2126-47A3-8B7C-822B502CF119", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*", "matchCriteriaId": "4DEB27E7-30AA-45CC-8934-B89263EF3551", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*", "matchCriteriaId": "E0005AEF-856E-47EB-BFE4-90C46899394D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*", "matchCriteriaId": "39889A68-6D34-47A6-82FC-CD0BF23D6754", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*", "matchCriteriaId": "B8383ABF-1457-401F-9B61-EE50F4C61F4F", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*", "matchCriteriaId": "B77A9280-37E6-49AD-B559-5B23A3B1DC3D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:*", "matchCriteriaId": "DE5298B3-04B4-4F3E-B186-01A58B5C75A6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc8:*:*:*:*:*:*", "matchCriteriaId": "E9D7C49C-53E7-4B23-9AFE-DAC5A18B153A", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable_offload: fix using __this_cpu_add in preemptible\n\nflow_offload_queue_work() can be called in workqueue without\nbh disabled, like the call trace showed in my act_ct testing,\ncalling NF_FLOW_TABLE_STAT_INC() there would cause a call\ntrace:\n\n BUG: using __this_cpu_add() in preemptible [00000000] code: kworker/u4:0/138560\n caller is flow_offload_queue_work+0xec/0x1b0 [nf_flow_table]\n Workqueue: act_ct_workqueue tcf_ct_flow_table_cleanup_work [act_ct]\n Call Trace:\n <TASK>\n dump_stack_lvl+0x33/0x46\n check_preemption_disabled+0xc3/0xf0\n flow_offload_queue_work+0xec/0x1b0 [nf_flow_table]\n nf_flow_table_iterate+0x138/0x170 [nf_flow_table]\n nf_flow_table_free+0x140/0x1a0 [nf_flow_table]\n tcf_ct_flow_table_cleanup_work+0x2f/0x2b0 [act_ct]\n process_one_work+0x6a3/0x1030\n worker_thread+0x8a/0xdf0\n\nThis patch fixes it by using NF_FLOW_TABLE_STAT_INC_ATOMIC()\ninstead in flow_offload_queue_work().\n\nNote that for FLOW_CLS_REPLACE branch in flow_offload_queue_work(),\nit may not be called in preemptible path, but it's good to use\nNF_FLOW_TABLE_STAT_INC_ATOMIC() for all cases in\nflow_offload_queue_work()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: flowtable_offload: correcci\u00f3n al usar __this_cpu_add en preemptible flow_offload_queue_work() se puede llamar en workqueue sin bh deshabilitado, como el seguimiento de llamadas que mostr\u00f3 en mi prueba act_ct, llamar a NF_FLOW_TABLE_STAT_INC() all\u00ed causar\u00eda un seguimiento de llamadas: ERROR: usar __this_cpu_add() en preemptible [00000000] c\u00f3digo: kworker/u4:0/138560 el llamador es flow_offload_queue_work+0xec/0x1b0 [nf_flow_table] Workqueue: act_ct_workqueue tcf_ct_flow_table_cleanup_work [act_ct] Seguimiento de llamadas: dump_stack_lvl+0x33/0x46 check_preemption_disabled+0xc3/0xf0 Este parche lo corrige al usar NF_FLOW_TABLE_STAT_INC_ATOMIC() en lugar de flow_offload_queue_work(). Tenga en cuenta que para la rama FLOW_CLS_REPLACE en flow_offload_queue_work(), es posible que no se la llame en una ruta preemptible, pero es bueno usar NF_FLOW_TABLE_STAT_INC_ATOMIC() para todos los casos en flow_offload_queue_work()."}], "id": "CVE-2022-48976", "lastModified": "2026-06-17T05:16:45.510", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-48976", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-22T13:18:28.477565Z", "version": "2.0.3"}}]}, "published": "2024-10-21T20:15:09.680", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a220a11fda012fba506b35929672374c2723ae6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a81047154e7ce4eb8769d5d21adcbc9693542a79"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2023:2458", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-284.11.1.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}, {"advisory": "RHSA-2023:2458", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-284.11.1.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}], "bugzilla": {"description": "kernel: netfilter: flowtable_offload: fix using __this_cpu_add in preemptible", "id": "2320792", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320792"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: flowtable_offload: fix using __this_cpu_add in preemptible\nflow_offload_queue_work() can be called in workqueue without\nbh disabled, like the call trace showed in my act_ct testing,\ncalling NF_FLOW_TABLE_STAT_INC() there would cause a call\ntrace:\nBUG: using __this_cpu_add() in preemptible [00000000] code: kworker/u4:0/138560\ncaller is flow_offload_queue_work+0xec/0x1b0 [nf_flow_table]\nWorkqueue: act_ct_workqueue tcf_ct_flow_table_cleanup_work [act_ct]\nCall Trace:\n<TASK>\ndump_stack_lvl+0x33/0x46\ncheck_preemption_disabled+0xc3/0xf0\nflow_offload_queue_work+0xec/0x1b0 [nf_flow_table]\nnf_flow_table_iterate+0x138/0x170 [nf_flow_table]\nnf_flow_table_free+0x140/0x1a0 [nf_flow_table]\ntcf_ct_flow_table_cleanup_work+0x2f/0x2b0 [act_ct]\nprocess_one_work+0x6a3/0x1030\nworker_thread+0x8a/0xdf0\nThis patch fixes it by using NF_FLOW_TABLE_STAT_INC_ATOMIC()\ninstead in flow_offload_queue_work().\nNote that for FLOW_CLS_REPLACE branch in flow_offload_queue_work(),\nit may not be called in preemptible path, but it's good to use\nNF_FLOW_TABLE_STAT_INC_ATOMIC() for all cases in\nflow_offload_queue_work()."], "name": "CVE-2022-48976", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48976\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48976\nhttps://lore.kernel.org/linux-cve-announce/2024102145-CVE-2022-48976-2980@gregkh/T"], "statement": "This issue is fixed in RHEL-9.2 and above:\n~~~\nin (rhel-9.2, rhel-9.3, rhel-9.4, rhel-9.5, rhel-9.6) netfilter: flowtable_offload: fix using __this_cpu_add in preemptible\n~~~\nPlease note that while RHEL-9 kernel-rt still appears as affected, it has been fixed in the same RHSA as RHEL-9 kernel. This is because from RHEL-9.3 onwards, the kernel and kernel-rt fixes are bundled together in a single errata.", "threat_severity": "Moderate"}

{}