{"id":"CVE-2022-50151","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: fix random warning message when driver load\n\nWarning log:\n[    4.141392] Unexpected gfp: 0x4 (GFP_DMA32)","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: fix random warning message when driver load\n\nWarning log:\n[    4.141392] Unexpected gfp: 0x4 (GFP_DMA32). Fixing up to gfp: 0xa20 (GFP_ATOMIC). Fix your cod…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.3, < 5.15.63","linux_kernel >= 5.16, < 5.19.2"],"patched":["linux_kernel 5.19.2"],"published":"2025-06-18","updated":"2026-08-15","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-50151","references":[{"url":"https://git.kernel.org/stable/c/8659ab3d936fcf0084676f98b75b317017aa8f82","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8e142744f0e96abc69ccd99e6d6c7eb662267f21","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/960a8a35a6027a08c4b511435bf59609b5d5e5cd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00197,"epssPercentile":0.08317,"ingestedAt":"2026-08-15T13:26:45.103Z","slug":"CVE-2022-50151","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: fix random warning message when driver load\n\nWarning log:\n[    4.141392] Unexpected gfp: 0x4 (GFP_DMA32). Fixing up to gfp: 0xa20 (GFP_ATOMIC). Fix your code!\n[    4.150340] CPU: 1 PID: 175 Comm: 1-0050 Not tainted 5.15.5-00039-g2fd9ae1b568c #20\n[    4.158010] Hardware name: Freescale i.MX8QXP MEK (DT)\n[    4.163155] Call trace:\n[    4.165600]  dump_backtrace+0x0/0x1b0\n[    4.169286]  show_stack+0x18/0x68\n[    4.172611]  dump_stack_lvl+0x68/0x84\n[    4.176286]  dump_stack+0x18/0x34\n[    4.179613]  kmalloc_fix_flags+0x60/0x88\n[    4.183550]  new_slab+0x334/0x370\n[    4.186878]  ___slab_alloc.part.108+0x4d4/0x748\n[    4.191419]  __slab_alloc.isra.109+0x30/0x78\n[    4.195702]  kmem_cache_alloc+0x40c/0x420\n[    4.199725]  dma_pool_alloc+0xac/0x1f8\n[    4.203486]  cdns3_allocate_trb_pool+0xb4/0xd0\n\npool_alloc_page(struct dma_pool *pool, gfp_t mem_flags)\n{\n\t...\n\tpage = kmalloc(sizeof(*page), mem_flags);\n\tpage->vaddr = dma_alloc_coherent(pool->dev, pool->allocation,\n\t\t\t\t\t &page->dma, mem_flags);\n\t...\n}\n\nkmalloc was called with mem_flags, which is passed down in\ncdns3_allocate_trb_pool() and have GFP_DMA32 flags.\nkmall_fix_flags() report warning.\n\nGFP_DMA32 is not useful at all. dma_alloc_coherent() will handle\nDMA memory region correctly by pool->dev. GFP_DMA32 can be removed\nsafely.\n\n## Affected\n\n- `linux_kernel >= 5.3, < 5.15.63`\n- `linux_kernel >= 5.16, < 5.19.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.19.2`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}