CVE-2021-20286

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{"acknowledgement": "This issue was discovered by Eric Blake (Red Hat).", "bugzilla": {"description": "libnbd: Assertion failure in nbd_unlocked_opt_go in lib/opt.c", "id": "1934727", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1934727"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-617", "details": ["A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to denial of service.", "A flaw was found in libnbd. A malicious server may be able to kill a client application using libnbd due to an assertion failure in nbd_unlocked_opt_go() leading to denial of service. The highest threat from this vulnerability is to system availability."], "name": "CVE-2021-20286", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "virt:rhel/libnbd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Not affected", "package_name": "virt:8.2/libnbd", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Fix deferred", "package_name": "virt:8.3/libnbd", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Affected", "package_name": "virt:av/libnbd", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "libnbd", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-03-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-20286\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-20286"], "statement": "Red Hat Enterprise Linux 8 is not affected by this issue. The affected API was introduced in upstream `libnbd` version 1.4 which is only shipped in RHEL Advanced Virtualization 8.3.0 onward.", "threat_severity": "Low"}

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