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"release_date": "2021-07-21T00:00:00Z"}, {"advisory": "RHSA-2021:2737", "cpe": "cpe:/o:redhat:enterprise_linux:7::hypervisor", "impact": "moderate", "package": "redhat-virtualization-host-0:4.3.17-20210713.0.el7_9", "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 7", "release_date": "2021-07-21T00:00:00Z"}, {"advisory": "RHSA-2021:2736", "cpe": "cpe:/o:redhat:rhev_hypervisor:4.4::el8", "impact": "moderate", "package": "redhat-virtualization-host-0:4.4.7-20210715.1.el8_4", "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8", "release_date": "2021-07-22T00:00:00Z"}], "bugzilla": {"description": "kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan", "id": "1961305", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1961305"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value.", "A use-after-free flaw was found in hci_send_acl in the bluetooth host controller interface (HCI) in Linux kernel, where a local attacker with an access rights could cause a denial of service problem on the system The issue results from the object hchan, freed in hci_disconn_loglink_complete_evt, yet still used in other places. The highest threat from this vulnerability is to data integrity, confidentiality and system availability."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible."}, "name": "CVE-2021-33034", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "impact": "moderate", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-03-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-33034\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-33034\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c4c8c9544099bb9043a10a5318130a943e32fc3\nhttps://sites.google.com/view/syzscope/kasan-use-after-free-read-in-hci_send_acl\nhttps://syzkaller.appspot.com/bug?id=2e1943a94647f7732dd6fc60368642d6e8dc91b1"], "threat_severity": "Important", "upstream_fix": "kernel 5.13 rc1"}