High 7.8Published Jul 3, 2025

CVE-2025-38115net_sched: sch_sfq: fix a potential crash on gso_skb handling

Updated under an hour ago (Oct 26, 2026, 10:30 PM ET)

Does this affect you?

It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: 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 &

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from a53851e2c3218aa30b77abd6e68cf1c371f15afe before c337efb20d6d9f9bbb4746f6b119917af5c886dc; from a53851e2c3218aa30b77abd6e68cf1c371f15afe before b44f791f27b14c9eb6b907fbe51f2ba8bec32085; from a53851e2c3218aa30b77abd6e68cf1c371f15afe before 5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72; from a53851e2c3218aa30b77abd6e68cf1c371f15afe before 9c19498bdd7cb9d854bd3c54260f71cf7408495e; from a53851e2c3218aa30b77abd6e68cf1c371f15afe before b4e9bab6011b9559b7c157b16b91ae46d4d8c533; from a53851e2c3218aa30b77abd6e68cf1c371f15afe before d1bc80da75c789f2f6830df89d91fb2f7a509943; from a53851e2c3218aa30b77abd6e68cf1c371f15afe before 82448d4dcd8406dec688632a405fdcf7f170ec69; from a53851e2c3218aa30b77abd6e68cf1c371f15afe before 82ffbe7776d0ac084031f114167712269bf3d832	CNA record
linux linux_kernel linux:linux_kernel	from 4.16 before 5.4.295; from 5.5 before 5.10.239; from 5.11 before 5.15.186; from 5.16 before 6.1.142; from 6.2 before 6.6.94; from 6.7 before 6.12.34; from 6.13 before 6.15.3; 6.16	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/c337efb20d6d9f9bbb4746f6b119917af5c886dc	patch
https://git.kernel.org/stable/c/b44f791f27b14c9eb6b907fbe51f2ba8bec32085	patch
https://git.kernel.org/stable/c/5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72	patch
https://git.kernel.org/stable/c/9c19498bdd7cb9d854bd3c54260f71cf7408495e	patch
https://git.kernel.org/stable/c/b4e9bab6011b9559b7c157b16b91ae46d4d8c533	patch
https://git.kernel.org/stable/c/d1bc80da75c789f2f6830df89d91fb2f7a509943	patch
https://git.kernel.org/stable/c/82448d4dcd8406dec688632a405fdcf7f170ec69	patch
https://git.kernel.org/stable/c/82ffbe7776d0ac084031f114167712269bf3d832	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	third-party-advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.