{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-22T20:32:45.711","vulnerabilities":[{"cve":{"id":"CVE-2023-54020","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-12-24T11:15:55.003","lastModified":"2026-04-15T00:35:42.020","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: sf-pdma: pdma_desc memory leak fix\n\nCommit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread support for a\nDMA channel\") changed sf_pdma_prep_dma_memcpy() to unconditionally\nallocate a new sf_pdma_desc each time it is called.\n\nThe driver previously recycled descs, by checking the in_use flag, only\nallocating additional descs if the existing one was in use. This logic\nwas removed in commit b2cc5c465c2c (\"dmaengine: sf-pdma: Add multithread\nsupport for a DMA channel\"), but sf_pdma_free_desc() was not changed to\nhandle the new behaviour.\n\nAs a result, each time sf_pdma_prep_dma_memcpy() is called, the previous\ndescriptor is leaked, over time leading to memory starvation:\n\n  unreferenced object 0xffffffe008447300 (size 192):\n  comm \"irq/39-mchp_dsc\", pid 343, jiffies 4294906910 (age 981.200s)\n  hex dump (first 32 bytes):\n    00 00 00 ff 00 00 00 00 b8 c1 00 00 00 00 00 00  ................\n    00 00 70 08 10 00 00 00 00 00 00 c0 00 00 00 00  ..p.............\n  backtrace:\n    [<00000000064a04f4>] kmemleak_alloc+0x1e/0x28\n    [<00000000018927a7>] kmem_cache_alloc+0x11e/0x178\n    [<000000002aea8d16>] sf_pdma_prep_dma_memcpy+0x40/0x112\n\nAdd the missing kfree() to sf_pdma_free_desc(), and remove the redundant\nin_use flag."}],"metrics":{},"references":[{"url":"https://git.kernel.org/stable/c/03fece43fa109beba7cc9948c02f5e2d1205d607","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8bd5040bd43f2b5ba3c898b09a3197a0c7ace126","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ad222c9af25e3f074c180e389b3477dce42afc4f","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b02e07015a5ac7bbc029da931ae17914b8ae0339","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}]}}]}