CVE-2025-38177 - Linux Kernel - Sch_hfsc Idempotent Vulnerability

CVE-2025-38177 - Linux Kernel - Sch_hfsc Idempotent Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Fri, 07/04/2025 - 17:28
CVE ID : CVE-2025-38177
Published : July 4, 2025, 1:15 p.m. | 48 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: sch_hfsc: make hfsc_qlen_notify() idempotent hfsc_qlen_notify() is not idempotent either and not friendly to its callers, like fq_codel_dequeue(). Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life: 1. update_vf() decreases cl->cl_nactive, so we can check whether it is non-zero before calling it. 2. eltree_remove() always removes RB node cl->el_node, but we can use RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.
Severity: 0.0 | NA
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