{"id":"CVE-2025-37992","title":"net_sched: Flush gso_skb list too during ->change()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: Flush gso_skb list too during ->change()\n\nPreviously, when reducing a qdisc's limit via the ->change() operation, only\nthe main skb queue was trimmed, potent…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < ea1132ccb112f51ba749c56a912f67970c2cd542","Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < d3336f746f196c6a53e0480923ae93939f047b6c","Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < d38939ebe0d992d581acb6885c1723fa83c1fb2c","Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < a7d6e0ac0a8861f6b1027488062251a8e28150fd","Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < d1365ca80b012d8a7863e45949e413fb61fa4861","Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76","Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < 2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8","Linux 3.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:47:38.583699Z"},"published":"2025-05-26","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:52:11.344Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-37992","references":[{"url":"https://git.kernel.org/stable/c/ea1132ccb112f51ba749c56a912f67970c2cd542"},{"url":"https://git.kernel.org/stable/c/d3336f746f196c6a53e0480923ae93939f047b6c"},{"url":"https://git.kernel.org/stable/c/d38939ebe0d992d581acb6885c1723fa83c1fb2c"},{"url":"https://git.kernel.org/stable/c/a7d6e0ac0a8861f6b1027488062251a8e28150fd"},{"url":"https://git.kernel.org/stable/c/d1365ca80b012d8a7863e45949e413fb61fa4861"},{"url":"https://git.kernel.org/stable/c/fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76"},{"url":"https://git.kernel.org/stable/c/2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8"}],"tags":["cve.org"],"epss":0.00216,"epssPercentile":0.12029,"ingestedAt":"2026-11-05T22:38:31.918Z","slug":"CVE-2025-37992","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: Flush gso_skb list too during ->change()\n\nPreviously, when reducing a qdisc's limit via the ->change() operation, only\nthe main skb queue was trimmed, potentially leaving packets in the gso_skb\nlist. This could result in NULL pointer dereference when we only check\nsch->limit against sch->q.qlen.\n\nThis patch introduces a new helper, qdisc_dequeue_internal(), which ensures\nboth the gso_skb list and the main queue are properly flushed when trimming\nexcess packets. All relevant qdiscs (codel, fq, fq_codel, fq_pie, hhf, pie)\nare updated to use this helper in their ->change() routines.\n\n## Affected\n\n- `Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < ea1132ccb112f51ba749c56a912f67970c2cd542`\n- `Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < d3336f746f196c6a53e0480923ae93939f047b6c`\n- `Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < d38939ebe0d992d581acb6885c1723fa83c1fb2c`\n- `Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < a7d6e0ac0a8861f6b1027488062251a8e28150fd`\n- `Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < d1365ca80b012d8a7863e45949e413fb61fa4861`\n- `Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76`\n- `Linux >= 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 < 2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8`\n- `Linux 3.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}