CVE-2025-38115net_sched: sch_sfq: fix a potential crash on gso_skb handling
Updated under an hour ago ()
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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.
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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
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
- https://git.kernel.org/stable/c/c337efb20d6d9f9bbb4746f6b119917af5c886dcpatch
- https://git.kernel.org/stable/c/b44f791f27b14c9eb6b907fbe51f2ba8bec32085patch
- https://git.kernel.org/stable/c/5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72patch
- https://git.kernel.org/stable/c/9c19498bdd7cb9d854bd3c54260f71cf7408495epatch
- https://git.kernel.org/stable/c/b4e9bab6011b9559b7c157b16b91ae46d4d8c533patch
- https://git.kernel.org/stable/c/d1bc80da75c789f2f6830df89d91fb2f7a509943patch
- https://git.kernel.org/stable/c/82448d4dcd8406dec688632a405fdcf7f170ec69patch
- https://git.kernel.org/stable/c/82ffbe7776d0ac084031f114167712269bf3d832patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlthird-party-advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlthird-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.