{"id":"CVE-2026-98492","title":"net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths\n\nFix 3 leaks in macb_alloc() error paths:\n- Tx buffer allocated but crossing a 4G boundary: Tx leak…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 78d901897b3cae06b38f54e48a2378cf9da21175 < bda487567d0b7b15dfa876511085c0666b9efad5","Linux >= 78d901897b3cae06b38f54e48a2378cf9da21175 < 259e6cbb6a097da8ced544ee92a6fbde35aa1338","Linux >= 78d901897b3cae06b38f54e48a2378cf9da21175 < 23d42b9a3bcd55b17d3b371544fedc708c2397e9","Linux 982a4d9a2e12b693f684eff943043a607628d871","Linux >= 6.17.3 < 6.18","Linux 6.18"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:16:21.208Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98492","references":[{"url":"https://git.kernel.org/stable/c/bda487567d0b7b15dfa876511085c0666b9efad5"},{"url":"https://git.kernel.org/stable/c/259e6cbb6a097da8ced544ee92a6fbde35aa1338"},{"url":"https://git.kernel.org/stable/c/23d42b9a3bcd55b17d3b371544fedc708c2397e9"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.290Z","slug":"CVE-2026-98492","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths\n\nFix 3 leaks in macb_alloc() error paths:\n- Tx buffer allocated but crossing a 4G boundary: Tx leaked.\n- Rx buffer allocation fails: Tx leaked.\n- Rx buffer allocated but crossing a 4G boundary: Tx & Rx leaked.\n\nThis is because our error handling calls macb_free(bp) which in turn\nfrees the buffers stored in bp->queues[0], but nothing has been stored\nin there. Fix by storing allocated buffers into bp->queues[0] ASAP.\n\n## Affected\n\n- `Linux >= 78d901897b3cae06b38f54e48a2378cf9da21175 < bda487567d0b7b15dfa876511085c0666b9efad5`\n- `Linux >= 78d901897b3cae06b38f54e48a2378cf9da21175 < 259e6cbb6a097da8ced544ee92a6fbde35aa1338`\n- `Linux >= 78d901897b3cae06b38f54e48a2378cf9da21175 < 23d42b9a3bcd55b17d3b371544fedc708c2397e9`\n- `Linux 982a4d9a2e12b693f684eff943043a607628d871`\n- `Linux >= 6.17.3 < 6.18`\n- `Linux 6.18`\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":[]}