CVE-2025-38115

MEDIUM EPSS 6.8%

Published Jul 3, 202512mo ago · Modified Jun 17, 20261w ago

5.5 CVSS 3.1

Medium

Published Jul 3, 2025 12mo ago

Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score

5.5

Exploitability

1.8

Impact

3.6

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector Local

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

6.8% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-401

Affected Products 9

Vendor	Product	Version	Range
linux	linux_kernel	*	≥4.16 – <5.4.295
linux	linux_kernel	*	≥5.5 – <5.10.239
linux	linux_kernel	*	≥5.11 – <5.15.186
linux	linux_kernel	*	≥5.16 – <6.1.142
linux	linux_kernel	*	≥6.2 – <6.6.94
linux	linux_kernel	*	≥6.7 – <6.12.34
linux	linux_kernel	*	≥6.13 – <6.15.3
linux	linux_kernel	6.16	any
debian	debian_linux	11.0	any

References 10

git.kernel.org https://git.kernel.org/stable/c/5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72

Patch
git.kernel.org https://git.kernel.org/stable/c/82448d4dcd8406dec688632a405fdcf7f170ec69

Patch
git.kernel.org https://git.kernel.org/stable/c/82ffbe7776d0ac084031f114167712269bf3d832

Patch
git.kernel.org https://git.kernel.org/stable/c/9c19498bdd7cb9d854bd3c54260f71cf7408495e

Patch
git.kernel.org https://git.kernel.org/stable/c/b44f791f27b14c9eb6b907fbe51f2ba8bec32085

Patch
git.kernel.org https://git.kernel.org/stable/c/b4e9bab6011b9559b7c157b16b91ae46d4d8c533

Patch
git.kernel.org https://git.kernel.org/stable/c/c337efb20d6d9f9bbb4746f6b119917af5c886dc

Patch
git.kernel.org https://git.kernel.org/stable/c/d1bc80da75c789f2f6830df89d91fb2f7a509943

Patch
lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

Third Party Advisory
lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Third Party Advisory

Remediation

git.kernel.org https://git.kernel.org/stable/c/5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72

Patch
git.kernel.org https://git.kernel.org/stable/c/82448d4dcd8406dec688632a405fdcf7f170ec69

Patch
git.kernel.org https://git.kernel.org/stable/c/82ffbe7776d0ac084031f114167712269bf3d832

Patch
git.kernel.org https://git.kernel.org/stable/c/9c19498bdd7cb9d854bd3c54260f71cf7408495e

Patch
git.kernel.org https://git.kernel.org/stable/c/b44f791f27b14c9eb6b907fbe51f2ba8bec32085

Patch
git.kernel.org https://git.kernel.org/stable/c/b4e9bab6011b9559b7c157b16b91ae46d4d8c533

Patch
git.kernel.org https://git.kernel.org/stable/c/c337efb20d6d9f9bbb4746f6b119917af5c886dc

Patch
git.kernel.org https://git.kernel.org/stable/c/d1bc80da75c789f2f6830df89d91fb2f7a509943

Patch