CVE-2026-64289

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{"bugzilla": {"description": "kernel: iommufd: Set upper bounds on cache invalidation entry_num and entry_len", "id": "2507101", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507101"}, "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-606", "details": ["A flaw was found in the Linux kernel. In the `iommufd` component, the `iommufd_hwpt_invalidate()` function allows a local user to provide excessively large values for `entry_num` and `entry_len` during cache invalidation. This can lead to a Denial of Service (DoS) by causing the system to become unresponsive. Specifically, large `entry_len` values can trigger a soft-lockup watchdog due to extensive memory scanning, while large `entry_num` values can cause an uninterruptible loop, pinning the CPU."], "name": "CVE-2026-64289", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64289\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64289\nhttps://lore.kernel.org/linux-cve-announce/2026072504-CVE-2026-64289-3802@gregkh/T"], "threat_severity": "Moderate"}

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