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{"bugzilla": {"description": "kernel: bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos", "id": "2320206", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320206"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos\nIn case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL\nreferencing a non-existing BTF type, function bpf_core_calc_relo_insn\nwould cause a null pointer deference.\nFix this by adding a proper check upper in call stack, as malformed\nrelocation records could be passed from user space.\nSimplest reproducer is a program:\nr0 = 0\nexit\nWith a single relocation record:\n.insn_off = 0, /* patch first instruction */\n.type_id = 100500, /* this type id does not exist */\n.access_str_off = 6, /* offset of string \"0\" */\n.kind = BPF_CORE_TYPE_ID_LOCAL,\nSee the link for original reproducer or next commit for a test case."], "name": "CVE-2024-49850", "package_state": [{"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:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "Not affected", "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": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-49850\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-49850\nhttps://lore.kernel.org/linux-cve-announce/2024102151-CVE-2024-49850-4cc6@gregkh/T"], "threat_severity": "Moderate"}