{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-98881", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98881", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-10-23T11:37:32.327Z", "updatedAt": "2026-10-23T11:37:32.327Z", "importedAt": "2026-10-24T01:58:41.756Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "net: bridge: remove stale rcu_barrier() in br_multicast_dev_del()", "summary": "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 \n [] context_switch+0xf2a/0x1730 kernel/sched/core.c:6483\n [] __schedule+0x1133/0x43a0 kernel/sched/core.c:8411\n [] __schedule_loop kernel/sched/core.c:8514 [inline]\n [] schedule+0xab/0x260 kernel/sched/core.c:8529\n [] schedule_timeout+0xc3/0x2b0 kernel/time/sleep_timeout.c:75\n [] do_wait_for_common kernel/sched/completion.c:100 [inline]\n [] __wait_for_common kernel/sched/completion.c:121 [inline]\n [] wait_for_common kernel/sched/completion.c:132 [inline]\n [] wait_for_completion+0x2c7/0x5d0 kernel/sched/completion.c:153\n [] rcu_barrier+0x49f/0x620 kernel/rcu/tree.c:3888\n [] br_multicast_dev_del+0x303/0x350 net/bridge/br_multicast.c:4459\n [] br_dev_uninit+0x1c/0x40 net/bridge/br_device.c:157\n [] unregister_netdevice_many_notify+0x1c1c/0x2300 net/core/dev.c:12599\n [] ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]\n [] ops_undo_list+0x3d3/0x940 net/core/net_namespace.c:248", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "35f9f11740515a10b084adfb1ce691351f2452ab" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "0443f6aac6bf6a91e406273fdda11497cef6ad07" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "ac0e823a228f94ad9d7a3d876cc07e59a7afb806" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "f0018acf0b66f93a292667c9a9c2a26c570cf270" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "372ee8fbe0f796031c60f676ec90f0788c26523d" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "39679927fa7aaf4601119f7234342d1b5d4f6f84" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "status": "affected", "versionType": "git", "lessThan": "25ae123db10ba9ab890b56bcdb0a4363aee8529a" }, { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "5.10.271" }, { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "5.15.222" }, { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "6.1.189" }, { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "6.6.158" }, { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "6.12.111" }, { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "6.18.53" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.10.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.222", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.189", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.158", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.111", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.53", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }