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{"bugzilla": {"description": "kernel: scsi: iscsi: Fix conn use after free during resets", "id": "2282433", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282433"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nscsi: iscsi: Fix conn use after free during resets\nIf we haven't done a unbind target call we can race where\niscsi_conn_teardown wakes up the EH thread and then frees the conn while\nthose threads are still accessing the conn ehwait.\nWe can only do one TMF per session so this just moves the TMF fields from\nthe conn to the session. We can then rely on the\niscsi_session_teardown->iscsi_remove_session->__iscsi_unbind_session call\nto remove the target and it's devices, and know after that point there is\nno device or scsi-ml callout trying to access the session.", "A vulnerability was found in the Linux kernel's iSCSI subsystem, where the iscsi_conn_teardown() function could use a freed connection during resets. This occurs if the connection is freed while still being accessed by error handler threads, potentially causing system instability or crashes."], "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 the affected package as soon as possible."}, "name": "CVE-2021-47328", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47328\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47328\nhttps://lore.kernel.org/linux-cve-announce/2024052134-CVE-2021-47328-441f@gregkh/T"], "statement": "This vulnerability is rated as a moderate severity because the issue poses a risk of system crashes or instability rather than direct data loss or unauthorized access.", "threat_severity": "Moderate"}

{}