{"cve":"CVE-2024-53058","nvd":{"published":"2024-11-19T18:15:25.767","modified":"2026-08-04T11:21:45.993","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: TSO: Fix unbalanced DMA map/unmap for non-paged SKB data\n\nIn case the non-paged data of a SKB carries protocol header and protocol\npayload to be transmitted on a certain platform that the DMA AXI address\nwidth is configured to 40-bit/48-bit, or the size of the non-paged data\nis bigger than TSO_MAX_BUFF_SIZE on a certain platform that the DMA AXI\naddress width is configured to 32-bit, then this SKB requires at least\ntwo DMA transmit descriptors to serve it.\n\nFor example, three descriptors are allocated to split one DMA buffer\nmapped from one piece of non-paged data:\n    dma_desc[N + 0],\n    dma_desc[N + 1],\n    dma_desc[N + 2].\nThen three elements of tx_q->tx_skbuff_dma[] will be allocated to hold\nextra information to be reused in stmmac_tx_clean():\n    tx_q->tx_skbuff_dma[N + 0],\n    tx_q->tx_skbuff_dma[N + 1],\n    tx_q->tx_skbuff_dma[N + 2].\nNow we focus on tx_q->tx_skbuff_dma[entry].buf, which is the DMA buffer\naddress returned by DMA mapping call. stmmac_tx_clean() will try to\nunmap the DMA buffer _ONLY_IF_ tx_q->tx_skbuff_dma[entry].buf\nis a valid buffer address.\n\nThe expected behavior that saves DMA buffer address of this non-paged\ndata to tx_q->tx_skbuff_dma[entry].buf is:\n    tx_q->tx_skbuff_dma[N + 0].buf = NULL;\n    tx_q->tx_skbuff_dma[N + 1].buf = NULL;\n    tx_q->tx_skbuff_dma[N + 2].buf = dma_map_single();\nUnfortunately, the current code misbehaves like this:\n    tx_q->tx_skbuff_dma[N + 0].buf = dma_map_single();\n    tx_q->tx_skbuff_dma[N + 1].buf = NULL;\n    tx_q->tx_skbuff_dma[N + 2].buf = NULL;\n\nOn the stmmac_tx_clean() side, when dma_desc[N + 0] is closed by the\nDMA engine, tx_q->tx_skbuff_dma[N + 0].buf is a valid buffer address\nobviously, then the DMA buffer will be unmapped immediately.\nThere may be a rare case that the DMA engine does not finish the\npending dma_desc[N + 1], dma_desc[N + 2] yet. Now things will go\nhorribly wrong, DMA is going to access a unmapped/unreferenced memory\nregion, corrupted data will be transmited or iommu fault will be\ntriggered :(\n\nIn contrast, the for-loop that maps SKB fragments behaves perfectly\nas expected, and that is how the driver should do for both non-paged\ndata and paged frags actually.\n\nThis patch corrects DMA map/unmap sequences by fixing the array index\nfor tx_q->tx_skbuff_dma[entry].buf when assigning DMA buffer address.\n\nTested and verified on DWXGMAC CORE 3.20a","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/07c9c26e37542486e34d767505e842f48f29c3f6","https://git.kernel.org/stable/c/58d23d835eb498336716cca55b5714191a309286","https://git.kernel.org/stable/c/66600fac7a984dea4ae095411f644770b2561ede","https://git.kernel.org/stable/c/a3ff23f7c3f0e13f718900803e090fd3997d6bc9","https://git.kernel.org/stable/c/ece593fc9c00741b682869d3f3dc584d37b7c9df"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:57:34.731061660+00:00"},"epss":{"cve":"CVE-2024-53058","score":0.00607,"percentile":0.4906,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}