{"id":"CVE-2025-38115","revision":"c917d38aea914d538df31bb9c9f1813e","records":[{"revision":"c917d38aea914d538df31bb9c9f1813e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38115","aliases":[],"title":"net_sched: sch_sfq: fix a potential crash on gso_skb handling","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: sch_sfq: fix a potential crash on gso_skb handling\n\nSFQ has an assumption of always being able to queue at least one packet.\n\nHowever, after the blamed commit, sch->q.len can be inflated by packets\nin sch->gso_skb, and an enqueue() on an empty SFQ qdisc can be followed\nby an immediate drop.\n\nFix sfq_drop() to properly clear q->tail in this situation.\n\n\nip netns add lb\nip link add dev to-lb type veth peer name in-lb netns lb\nethtool -K to-lb tso off                 # force qdisc to requeue gso_skb\nip netns exec lb ethtool -K in-lb gro on # enable NAPI\nip link set dev to-lb up\nip -netns lb link set dev in-lb up\nip addr add dev to-lb 192.168.20.1/24\nip -netns lb addr add dev in-lb 192.168.20.2/24\ntc qdisc replace dev to-lb root sfq limit 100\n\nip netns exec lb netserver\n\nnetperf -H 192.168.20.2 -l 100 &\nnetperf -H 192.168.20.2 -l 100 &\nnetperf -H 192.168.20.2 -l 100 &\nnetperf -H 192.168.20.2 -l 100 &","state":0,"publishedAt":"2025-07-03T08:35:23.75+00:00","modifiedAt":"2026-10-15T21:52:08.9+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/sched/sch_sfq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a53851e2c3218aa30b77abd6e68cf1c371f15afe\",\n                            \"lessThan\": \"c337efb20d6d9f9bbb4746f6b119917af5c886dc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53851e2c3218aa30b77abd6e68cf1c371f15afe\",\n                            \"lessThan\": \"b44f791f27b14c9eb6b907fbe51f2ba8bec32085\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53851e2c3218aa30b77abd6e68cf1c371f15afe\",\n                            \"lessThan\": \"5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53851e2c3218aa30b77abd6e68cf1c371f15afe\",\n                            \"lessThan\": \"9c19498bdd7cb9d854bd3c54260f71cf7408495e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53851e2c3218aa30b77abd6e68cf1c371f15afe\",\n                            \"lessThan\": \"b4e9bab6011b9559b7c157b16b91ae46d4d8c533\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53851e2c3218aa30b77abd6e68cf1c371f15afe\",\n                            \"lessThan\": \"d1bc80da75c789f2f6830df89d91fb2f7a509943\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53851e2c3218aa30b77abd6e68cf1c371f15afe\",\n                            \"lessThan\": \"82448d4dcd8406dec688632a405fdcf7f170ec69\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a53851e2c3218aa30b77abd6e68cf1c371f15afe\",\n                            \"lessThan\": \"82ffbe7776d0ac084031f114167712269bf3d832\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/sched/sch_sfq.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.16\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.295\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.239\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.186\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.142\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.94\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.34\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15.3\",\n                            \"lessThanOrEqual\": \"6.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.16\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/c337efb20d6d9f9bbb4746f6b119917af5c886dc","https://git.kernel.org/stable/c/b44f791f27b14c9eb6b907fbe51f2ba8bec32085","https://git.kernel.org/stable/c/5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72","https://git.kernel.org/stable/c/9c19498bdd7cb9d854bd3c54260f71cf7408495e","https://git.kernel.org/stable/c/b4e9bab6011b9559b7c157b16b91ae46d4d8c533","https://git.kernel.org/stable/c/d1bc80da75c789f2f6830df89d91fb2f7a509943","https://git.kernel.org/stable/c/82448d4dcd8406dec688632a405fdcf7f170ec69","https://git.kernel.org/stable/c/82ffbe7776d0ac084031f114167712269bf3d832"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38115","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38115","identifiers":["CVE-2025-38115"]},"retained":false,"historicalAffected":[]}],"coverage":[]}