{"id":"CVE-2026-43031","summary":"net: xilinx: axienet: Fix BQL accounting for multi-BD TX packets","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: xilinx: axienet: Fix BQL accounting for multi-BD TX packets\n\nWhen a TX packet spans multiple buffer descriptors (scatter-gather),\naxienet_free_tx_chain sums the per-BD actual length from descriptor\nstatus into a caller-provided accumulator. That sum is reset on each\nNAPI poll. If the BDs for a single packet complete across different\npolls, the earlier bytes are lost and never credited to BQL. This\ncauses BQL to think bytes are permanently in-flight, eventually\nstalling the TX queue.\n\nThe SKB pointer is stored only on the last BD of a packet. When that\nBD completes, use skb-\u003elen for the byte count instead of summing\nper-BD status lengths. This matches netdev_sent_queue(), which debits\nskb-\u003elen, and naturally survives across polls because no partial\npacket contributes to the accumulator.","modified":"2026-07-15T01:49:08.544581368Z","published":"2026-05-01T14:15:31.256Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43031.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2a0323a913109b52bfc9f5ea7b92a1b249e07d3e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3c3a6b9020c01fde7b22e8550105de0b59904f61"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d1978d03e86785872871bff9c2623174b10740de"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43031.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43031"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c900e49d58eb32b192b6d200ace4ae3ab89779d4"},{"fixed":"2a0323a913109b52bfc9f5ea7b92a1b249e07d3e"},{"fixed":"3c3a6b9020c01fde7b22e8550105de0b59904f61"},{"fixed":"d1978d03e86785872871bff9c2623174b10740de"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43031.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.15.0"},{"fixed":"6.18.22"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43031.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}