{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: flush works in dependency order\n\nvirtio_vsock_remove() stops the virtqueues and then flushes each work\nitem before freeing the enclosing virtio_vsock. The current order does\nnot account for dependencies between those items: tx_work may queue\nsend_pkt_work, and send_pkt_work may queue rx_work.\n\nIn particular, send_pkt_work can set restart_rx and release tx_lock.\nThe remove path can then stop the queues and flush rx_work before\nsend_pkt_work queues it. Although the later send_pkt_work flush waits\nfor that producer to finish, nothing waits for the newly queued rx_work,\nso kfree(vsock) can race with it.\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in\n virtio_transport_rx_work+0x487/0x4b0\n Read of size 8 at addr ffff888114c2b008 by task kworker/1:1/47\n Workqueue: virtio_vsock virtio_transport_rx_work\n Call Trace:\n virtio_transport_rx_work+0x487/0x4b0\n process_one_work+0x688/0x1120\n worker_thread+0x45b/0xd10\n Allocated by task 1:\n virtio_vsock_probe+0xef/0x6b0\n Freed by task 84:\n kfree+0x131/0x3c0\n virtio_vsock_remove+0xd1/0x100\n\nFlush the works in producer-to-consumer order. virtio_vsock_vqs_del()\nhas already disabled the queue callbacks and cleared the run flags, so\nafter tx_work and send_pkt_work are drained, no source remains that can\nqueue rx_work after its flush.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80932" }, { "summary":"CVE-2026-80932 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-80932.json" }, { "summary":"openEuler-SA-2026-4718", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4718" }, { "summary":"CVE-2026-80932", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-80932&packageName=kernel" } ], "title":"openEuler cve CVE-2026-80932", "tracking":{ "initial_release_date":"2026-11-09T10:46:29+08:00", "revision_history":[ { "date":"2026-11-09T10:46:29+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-11-09T10:46:29+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-11-09T10:46:29+08:00", "id":"CVE-2026-80932", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { 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the enclosing virtio_vsock. The current order does\nnot account for dependencies between those items: tx_work may queue\nsend_pkt_work, and send_pkt_work may queue rx_work.\n\nIn particular, send_pkt_work can set restart_rx and release tx_lock.\nThe remove path can then stop the queues and flush rx_work before\nsend_pkt_work queues it. Although the later send_pkt_work flush waits\nfor that producer to finish, nothing waits for the newly queued rx_work,\nso kfree(vsock) can race with it.\n\nKASAN reported:\n\n BUG: KASAN: slab-use-after-free in\n virtio_transport_rx_work+0x487/0x4b0\n Read of size 8 at addr ffff888114c2b008 by task kworker/1:1/47\n Workqueue: virtio_vsock virtio_transport_rx_work\n Call Trace:\n virtio_transport_rx_work+0x487/0x4b0\n process_one_work+0x688/0x1120\n worker_thread+0x45b/0xd10\n Allocated by task 1:\n virtio_vsock_probe+0xef/0x6b0\n Freed by task 84:\n kfree+0x131/0x3c0\n virtio_vsock_remove+0xd1/0x100\n\nFlush the works in producer-to-consumer order. virtio_vsock_vqs_del()\nhas already disabled the queue callbacks and cleared the run flags, so\nafter tx_work and send_pkt_work are drained, no source remains that can\nqueue rx_work after its flush.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ 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"openEuler-22.03-LTS-SP4:kernel-5.10.0-340.0.0.241.oe2203sp4.src" ] } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2026-80932" } ] }