{"id":"CVE-2025-38115","revision":null,"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":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all 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