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Re-order it to do\nthe dereferences before queuing up the free.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-10-15 08:15:35","updated_at":"2026-07-14 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the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: Fix potential use after free in otx2_tc_add_flow()\n\nThis code calls kfree_rcu(new_node, rcu) and then dereferences \"new_node\"\nand then dereferences it on the next line.  Two lines later, we take\na mutex so I don't think this is an RCU safe region.  Re-order it to do\nthe dereferences before queuing up the free."}],"providerMetadata":{"dateUpdated":"2026-05-11T21:40:06.488Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5723120423a753a220b8b2954b273838b9d7e74a"},{"url":"https://git.kernel.org/stable/c/df2c071061ed52d2225d97b212d27ecedf456b8a"},{"url":"https://git.kernel.org/stable/c/c41b2941a024d4ec7c768e16ffb10a74b188fced"},{"url":"https://git.kernel.org/stable/c/a8a63f27c3a8a3714210d32b12fd0f16d0337414"},{"url":"https://git.kernel.org/stable/c/d9c70e93ec5988ab07ad2a92d9f9d12867f02c56"}],"title":"octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-39978","datePublished":"2025-10-15T07:55:58.949Z","dateReserved":"2025-04-16T07:20:57.150Z","dateUpdated":"2026-07-14T12:43:13.010Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-10-15 08:15:35","lastModifiedDate":"2026-07-14 13:17:52","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"39978","Ordinal":"1","Title":"octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()","CVE":"CVE-2025-39978","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"39978","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: Fix potential use after free in otx2_tc_add_flow()\n\nThis code calls kfree_rcu(new_node, rcu) and then dereferences \"new_node\"\nand then dereferences it on the next line.  Two lines later, we take\na mutex so I don't think this is an RCU safe region.  Re-order it to do\nthe dereferences before queuing up the free.","Type":"Description","Title":"octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()"}]}}}