{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-48976",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-08-22T01:27:53.632Z",
        "datePublished": "2024-10-21T20:05:55.739Z",
        "dateUpdated": "2026-05-23T15:21:14.168Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T15:21:14.168Z"
            },
            "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()."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nf_flow_table_offload.c"
                    ],
                    "versions": [
                        {
                            "version": "b038177636f83bbf87c2b238706474145dd2cd04",
                            "lessThan": "a220a11fda012fba506b35929672374c2723ae6d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b038177636f83bbf87c2b238706474145dd2cd04",
                            "lessThan": "a81047154e7ce4eb8769d5d21adcbc9693542a79",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5345d78ae64d5a760c211cd2da995dc71c5b29e4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.15.157",
                            "lessThan": "5.16",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nf_flow_table_offload.c"
                    ],
                    "versions": [
                        {
                            "version": "6.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.13",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.0.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.157"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a220a11fda012fba506b35929672374c2723ae6d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a81047154e7ce4eb8769d5d21adcbc9693542a79"
                }
            ],
            "title": "netfilter: flowtable_offload: fix using __this_cpu_add in preemptible",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2022-48976",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                        "Automatable": "no"
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                                        "Technical Impact": "partial"
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                                "version": "2.0.3",
                                "timestamp": "2024-10-22T13:18:28.477565Z"
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}