CVE-2025-40083 — NULL Pointer Dereference in Linux
Severity
7.8HIGHOSV
OSV3.2
No vectorEPSS
0.1%
top 77.28%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedOct 29
Latest updateApr 13
Description
In the Linux kernel, the following vulnerability has been resolved:
net/sched: sch_qfq: Fix null-deref in agg_dequeue
To prevent a potential crash in agg_dequeue (net/sched/sch_qfq.c)
when cl->qdisc->ops->peek(cl->qdisc) returns NULL, we check the return
value before using it, similar to the existing approach in sch_hfsc.c.
To avoid code duplication, the following changes are made:
1. Changed qdisc_warn_nonwc(include/net/pkt_sched.h) into a static
inline function.
2. Moved qdisc_peek_len fr…