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{"bugzilla": {"description": "kernel: riscv: fix race when vmap stack overflow", "id": "2320666", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320666"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nriscv: fix race when vmap stack overflow\nCurrently, when detecting vmap stack overflow, riscv firstly switches\nto the so called shadow stack, then use this shadow stack to call the\nget_overflow_stack() to get the overflow stack. However, there's\na race here if two or more harts use the same shadow stack at the same\ntime.\nTo solve this race, we introduce spin_shadow_stack atomic var, which\nwill be swap between its own address and 0 in atomic way, when the\nvar is set, it means the shadow_stack is being used; when the var\nis cleared, it means the shadow_stack isn't being used.\n[Palmer: Add AQ to the swap, and also some comments.]"], "name": "CVE-2022-49001", "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-2022-49001\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49001\nhttps://lore.kernel.org/linux-cve-announce/2024102150-CVE-2022-49001-589c@gregkh/T"], "threat_severity": "Moderate"}

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