{"cve":"CVE-2021-47047","nvd":{"published":"2024-02-28T09:15:40.323","modified":"2026-06-17T04:16:18.243","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nspi: spi-zynqmp-gqspi: return -ENOMEM if dma_map_single fails\n\nThe spi controller supports 44-bit address space on AXI in DMA mode,\nso set dma_addr_t width to 44-bit to avoid using a swiotlb mapping.\nIn addition, if dma_map_single fails, it should return immediately\ninstead of continuing doing the DMA operation which bases on invalid\naddress.\n\nThis fixes the following crash which occurs in reading a big block\nfrom flash:\n\n[  123.633577] zynqmp-qspi ff0f0000.spi: swiotlb buffer is full (sz: 4194304 bytes), total 32768 (slots), used 0 (slots)\n[  123.644230] zynqmp-qspi ff0f0000.spi: ERR:rxdma:memory not mapped\n[  123.784625] Unable to handle kernel paging request at virtual address 00000000003fffc0\n[  123.792536] Mem abort info:\n[  123.795313]   ESR = 0x96000145\n[  123.798351]   EC = 0x25: DABT (current EL), IL = 32 bits\n[  123.803655]   SET = 0, FnV = 0\n[  123.806693]   EA = 0, S1PTW = 0\n[  123.809818] Data abort info:\n[  123.812683]   ISV = 0, ISS = 0x00000145\n[  123.816503]   CM = 1, WnR = 1\n[  123.819455] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000805047000\n[  123.825887] [00000000003fffc0] pgd=0000000803b45003, p4d=0000000803b45003, pud=0000000000000000\n[  123.834586] Internal error: Oops: 96000145 [#1] PREEMPT SMP","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/126bdb606fd2802454e6048caef1be3e25dd121e","https://git.kernel.org/stable/c/5980a3b9c933408bc22b0e349b78c3ebd7cbf880","https://git.kernel.org/stable/c/bad5a23cf2b477fa78b85fd392736dae09a1e818","https://git.kernel.org/stable/c/c26c026eb496261dbc0adbf606cc81989cd2038c","https://git.kernel.org/stable/c/126bdb606fd2802454e6048caef1be3e25dd121e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2021-47047","score":0.00239,"percentile":0.15004,"date":"2026-10-31"},"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."]}