{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "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\nBluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()\n\nExtend a critical section to prevent chan from early freeing.\nAlso make the l2cap_connect() return type void. Nothing is using the\nreturned value but it is ugly to return a potentially freed pointer.\nMaking it void will help with backports because earlier kernels did use\nthe return value. Now the compile will break for kernels where this\npatch is not a complete fix.\n\nCall stack summary:\n\n[use]\nl2cap_bredr_sig_cmd\n l2cap_connect\n ┌ mutex_lock(&conn->chan_lock);\n │ chan = pchan->ops->new_connection(pchan); <- alloc chan\n │ __l2cap_chan_add(conn, chan);\n │ l2cap_chan_hold(chan);\n │ list_add(&chan->list, &conn->chan_l); ... (1)\n └ mutex_unlock(&conn->chan_lock);\n chan->conf_state ... (4) <- use after free\n\n[free]\nl2cap_conn_del\n┌ mutex_lock(&conn->chan_lock);\n│ foreach chan in conn->chan_l: ... (2)\n│ l2cap_chan_put(chan);\n│ l2cap_chan_destroy\n│ kfree(chan) ... (3) <- chan freed\n└ mutex_unlock(&conn->chan_lock);\n\n==================================================================\nBUG: KASAN: slab-use-after-free in instrument_atomic_read\ninclude/linux/instrumented.h:68 [inline]\nBUG: KASAN: slab-use-after-free in _test_bit\ninclude/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]\nBUG: KASAN: slab-use-after-free in l2cap_connect+0xa67/0x11a0\nnet/bluetooth/l2cap_core.c:4260\nRead of size 8 at addr ffff88810bf040a0 by task kworker/u3:1/311", "category":"general", "title":"Synopsis" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2024-36013" }, { "summary":"CVE-2024-36013 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2024/csaf-openeuler-cve-2024-36013.json" }, { "summary":"openEuler-SA-2025-1078", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1078" }, { "summary":"CVE-2024-36013", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2024-36013&packageName=kernel" } ], "title":"openEuler cve CVE-2024-36013", "tracking":{ "initial_release_date":"2025-01-24T21:48:47+08:00", "revision_history":[ { "date":"2025-01-24T21:48:47+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2025-01-24T21:48:47+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2025-01-24T21:48:47+08:00", "id":"CVE-2024-36013", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ 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openEuler-24.03-LTS" }, "category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2024-36013", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix slab-use-after-free in l2cap_connect()\n\nExtend a critical section to prevent chan from early freeing.\nAlso make the l2cap_connect() return type void. Nothing is using the\nreturned value but it is ugly to return a potentially freed pointer.\nMaking it void will help with backports because earlier kernels did use\nthe return value. Now the compile will break for kernels where this\npatch is not a complete fix.\n\nCall stack summary:\n\n[use]\nl2cap_bredr_sig_cmd\n l2cap_connect\n ┌ mutex_lock(&conn->chan_lock);\n │ chan = pchan->ops->new_connection(pchan); <- alloc chan\n │ __l2cap_chan_add(conn, chan);\n │ l2cap_chan_hold(chan);\n │ list_add(&chan->list, &conn->chan_l); ... (1)\n └ mutex_unlock(&conn->chan_lock);\n chan->conf_state ... (4) <- use after free\n\n[free]\nl2cap_conn_del\n┌ mutex_lock(&conn->chan_lock);\n│ foreach chan in conn->chan_l: ... (2)\n│ l2cap_chan_put(chan);\n│ l2cap_chan_destroy\n│ kfree(chan) ... (3) <- chan freed\n└ mutex_unlock(&conn->chan_lock);\n\n==================================================================\nBUG: KASAN: slab-use-after-free in instrument_atomic_read\ninclude/linux/instrumented.h:68 [inline]\nBUG: KASAN: slab-use-after-free in _test_bit\ninclude/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]\nBUG: KASAN: slab-use-after-free in l2cap_connect+0xa67/0x11a0\nnet/bluetooth/l2cap_core.c:4260\nRead of size 8 at addr ffff88810bf040a0 by task kworker/u3:1/311", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS:kernel-6.6.0-75.0.0.68.oe2403.src", "openEuler-24.03-LTS:bpftool-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:bpftool-debuginfo-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debuginfo-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debugsource-6.6.0-75.0.0.68.oe2403.aarch64", 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"category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1078" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":6.8, "vectorString":"CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H", "version":"3.1" }, "products":[ "openEuler-24.03-LTS:kernel-6.6.0-75.0.0.68.oe2403.src", "openEuler-24.03-LTS:bpftool-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:bpftool-debuginfo-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debuginfo-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-debugsource-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-devel-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-headers-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-source-6.6.0-75.0.0.68.oe2403.aarch64", "openEuler-24.03-LTS:kernel-tools-6.6.0-75.0.0.68.oe2403.aarch64", 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"openEuler-24.03-LTS:kernel-tools-6.6.0-75.0.0.68.oe2403.x86_64", "openEuler-24.03-LTS:kernel-tools-debuginfo-6.6.0-75.0.0.68.oe2403.x86_64", "openEuler-24.03-LTS:kernel-tools-devel-6.6.0-75.0.0.68.oe2403.x86_64", "openEuler-24.03-LTS:perf-6.6.0-75.0.0.68.oe2403.x86_64", "openEuler-24.03-LTS:perf-debuginfo-6.6.0-75.0.0.68.oe2403.x86_64", "openEuler-24.03-LTS:python3-perf-6.6.0-75.0.0.68.oe2403.x86_64", "openEuler-24.03-LTS:python3-perf-debuginfo-6.6.0-75.0.0.68.oe2403.x86_64" ] } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2024-36013" } ] }