CVE-2025-37992 - Linux Kernel net_sched NULL Pointer Dereference Vulnerability

CVE-2025-37992 - Linux Kernel net_sched NULL Pointer Dereference Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Mon, 05/26/2025 - 20:41
CVE ID : CVE-2025-37992
Published : May 26, 2025, 3:15 p.m. | 3 hours, 26 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: net_sched: Flush gso_skb list too during ->change() Previously, when reducing a qdisc's limit via the ->change() operation, only the main skb queue was trimmed, potentially leaving packets in the gso_skb list. This could result in NULL pointer dereference when we only check sch->limit against sch->q.qlen. This patch introduces a new helper, qdisc_dequeue_internal(), which ensures both the gso_skb list and the main queue are properly flushed when trimming excess packets. All relevant qdiscs (codel, fq, fq_codel, fq_pie, hhf, pie) are updated to use this helper in their ->change() routines.
Severity: 0.0 | NA
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