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{"bugzilla": {"description": "kernel: sch_htb: make htb_qlen_notify() idempotent", "id": "2367511", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2367511"}, "csaw": false, "cvss3": {"cvss3_base_score": "1.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsch_htb: make htb_qlen_notify() idempotent\nhtb_qlen_notify() always deactivates the HTB class and in fact could\ntrigger a warning if it is already deactivated. Therefore, it is not\nidempotent and not friendly to its callers, like fq_codel_dequeue().\nLet's make it idempotent to ease qdisc_tree_reduce_backlog() callers'\nlife."], "name": "CVE-2025-37932", "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": "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-05-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-37932\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-37932\nhttps://lore.kernel.org/linux-cve-announce/2025052006-CVE-2025-37932-0842@gregkh/T"], "statement": "htb_qlen_notify() could wrongly trigger a kernel warning when called on an already-deactivated HTB class. This patch adds a guard to make the function idempotent. The security impact is minimal.", "threat_severity": "Low"}

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