{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98881",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.378Z",
        "datePublished": "2026-10-23T11:37:32.327Z",
        "dateUpdated": "2026-10-23T11:37:32.327Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-23T11:37:32.327Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: remove stale rcu_barrier() in br_multicast_dev_del()\n\nThis rcu_barrier() came from a time call_rcu() calls were used in\nnet/bridge/br_multicast.c.\n\nNow kfree_rcu() is there, we can remove this problematic rcu_barrier()\nwhich causes extreme RTNL pressure in many syzbot reports.\n\nINFO: task syz-executor:77945 is blocked on a mutex likely owned by task kworker/u1024:5:36537.\ntask:kworker/u1024:5 state:D stack:24616 pid:36537 tgid:36537 ppid:2      task_flags:0x4208060 flags:0x00080000 last_sleep:612797637337\nWorkqueue: netns cleanup_net\nCall Trace:\n <TASK>\n  [<ffffffff81914eaa>] context_switch+0xf2a/0x1730 kernel/sched/core.c:6483\n  [<ffffffff81201143>] __schedule+0x1133/0x43a0 kernel/sched/core.c:8411\n  [<ffffffff8120446b>] __schedule_loop kernel/sched/core.c:8514 [inline]\n  [<ffffffff8120446b>] schedule+0xab/0x260 kernel/sched/core.c:8529\n  [<ffffffff8121a093>] schedule_timeout+0xc3/0x2b0 kernel/time/sleep_timeout.c:75\n  [<ffffffff81205347>] do_wait_for_common kernel/sched/completion.c:100 [inline]\n  [<ffffffff81205347>] __wait_for_common kernel/sched/completion.c:121 [inline]\n  [<ffffffff81205347>] wait_for_common kernel/sched/completion.c:132 [inline]\n  [<ffffffff81205347>] wait_for_completion+0x2c7/0x5d0 kernel/sched/completion.c:153\n  [<ffffffff81b8f27f>] rcu_barrier+0x49f/0x620 kernel/rcu/tree.c:3888\n  [<ffffffff860091b3>] br_multicast_dev_del+0x303/0x350 net/bridge/br_multicast.c:4459\n  [<ffffffff85fb5dbc>] br_dev_uninit+0x1c/0x40 net/bridge/br_device.c:157\n  [<ffffffff8568058c>] unregister_netdevice_many_notify+0x1c1c/0x2300 net/core/dev.c:12599\n  [<ffffffff8562be43>] ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]\n  [<ffffffff8562be43>] ops_undo_list+0x3d3/0x940 net/core/net_namespace.c:248"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bridge/br_multicast.c"
                    ],
                    "versions": [
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "35f9f11740515a10b084adfb1ce691351f2452ab",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "0443f6aac6bf6a91e406273fdda11497cef6ad07",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "ac0e823a228f94ad9d7a3d876cc07e59a7afb806",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "f0018acf0b66f93a292667c9a9c2a26c570cf270",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "372ee8fbe0f796031c60f676ec90f0788c26523d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "39679927fa7aaf4601119f7234342d1b5d4f6f84",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "25ae123db10ba9ab890b56bcdb0a4363aee8529a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.10.271",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15.222",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.1.189",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.6.158",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.12.111",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18.53",
                            "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/bridge/br_multicast.c"
                    ],
                    "versions": [
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/35f9f11740515a10b084adfb1ce691351f2452ab"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0443f6aac6bf6a91e406273fdda11497cef6ad07"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ac0e823a228f94ad9d7a3d876cc07e59a7afb806"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f0018acf0b66f93a292667c9a9c2a26c570cf270"
                },
                {
                    "url": "https://git.kernel.org/stable/c/372ee8fbe0f796031c60f676ec90f0788c26523d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/39679927fa7aaf4601119f7234342d1b5d4f6f84"
                },
                {
                    "url": "https://git.kernel.org/stable/c/25ae123db10ba9ab890b56bcdb0a4363aee8529a"
                }
            ],
            "title": "net: bridge: remove stale rcu_barrier() in br_multicast_dev_del()",
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    }
}