CVE-2025-37992

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue concerns a NULL pointer dereference in the Linux kernel's net sched component. 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 a NULL pointer dereference when checking sch->limit against sch->q.qlen. A new helper, qdisc dequeue internal(), has been introduced to ensure 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.