CVE-2025-38115

Source
https://nvd.nist.gov/vuln/detail/CVE-2025-38115
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38115.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-38115
Downstream
Related
Published
2025-07-03T09:15:25Z
Modified
2025-08-12T21:01:18Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

netsched: schsfq: fix a potential crash on gso_skb handling

SFQ has an assumption of always being able to queue at least one packet.

However, after the blamed commit, sch->q.len can be inflated by packets in sch->gso_skb, and an enqueue() on an empty SFQ qdisc can be followed by an immediate drop.

Fix sfq_drop() to properly clear q->tail in this situation.

ip netns add lb ip link add dev to-lb type veth peer name in-lb netns lb ethtool -K to-lb tso off # force qdisc to requeue gso_skb ip netns exec lb ethtool -K in-lb gro on # enable NAPI ip link set dev to-lb up ip -netns lb link set dev in-lb up ip addr add dev to-lb 192.168.20.1/24 ip -netns lb addr add dev in-lb 192.168.20.2/24 tc qdisc replace dev to-lb root sfq limit 100

ip netns exec lb netserver

netperf -H 192.168.20.2 -l 100 & netperf -H 192.168.20.2 -l 100 & netperf -H 192.168.20.2 -l 100 & netperf -H 192.168.20.2 -l 100 &

References

Affected packages