{"cve":"CVE-2023-52730","nvd":{"published":"2024-05-21T16:15:13.157","modified":"2026-06-17T06:43:27.000","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: sdio: fix possible resource leaks in some error paths\n\nIf sdio_add_func() or sdio_init_func() fails, sdio_remove_func() can\nnot release the resources, because the sdio function is not presented\nin these two cases, it won't call of_node_put() or put_device().\n\nTo fix these leaks, make sdio_func_present() only control whether\ndevice_del() needs to be called or not, then always call of_node_put()\nand put_device().\n\nIn error case in sdio_init_func(), the reference of 'card->dev' is\nnot get, to avoid redundant put in sdio_free_func_cis(), move the\nget_device() to sdio_alloc_func() and put_device() to sdio_release_func(),\nit can keep the get/put function be balanced.\n\nWithout this patch, while doing fault inject test, it can get the\nfollowing leak reports, after this fix, the leak is gone.\n\nunreferenced object 0xffff888112514000 (size 2048):\n  comm \"kworker/3:2\", pid 65, jiffies 4294741614 (age 124.774s)\n  hex dump (first 32 bytes):\n    00 e0 6f 12 81 88 ff ff 60 58 8d 06 81 88 ff ff  ..o.....`X......\n    10 40 51 12 81 88 ff ff 10 40 51 12 81 88 ff ff  .@Q......@Q.....\n  backtrace:\n    [<000000009e5931da>] kmalloc_trace+0x21/0x110\n    [<000000002f839ccb>] mmc_alloc_card+0x38/0xb0 [mmc_core]\n    [<0000000004adcbf6>] mmc_sdio_init_card+0xde/0x170 [mmc_core]\n    [<000000007538fea0>] mmc_attach_sdio+0xcb/0x1b0 [mmc_core]\n    [<00000000d4fdeba7>] mmc_rescan+0x54a/0x640 [mmc_core]\n\nunreferenced object 0xffff888112511000 (size 2048):\n  comm \"kworker/3:2\", pid 65, jiffies 4294741623 (age 124.766s)\n  hex dump (first 32 bytes):\n    00 40 51 12 81 88 ff ff e0 58 8d 06 81 88 ff ff  .@Q......X......\n    10 10 51 12 81 88 ff ff 10 10 51 12 81 88 ff ff  ..Q.......Q.....\n  backtrace:\n    [<000000009e5931da>] kmalloc_trace+0x21/0x110\n    [<00000000fcbe706c>] sdio_alloc_func+0x35/0x100 [mmc_core]\n    [<00000000c68f4b50>] mmc_attach_sdio.cold.18+0xb1/0x395 [mmc_core]\n    [<00000000d4fdeba7>] mmc_rescan+0x54a/0x640 [mmc_core]","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":["CWE-401"],"references":["https://git.kernel.org/stable/c/1e06cf04239e202248c8fa356bf11449dc73cfbd","https://git.kernel.org/stable/c/30716d9f0fa1766e522cf24c8a456244e4fc9931","https://git.kernel.org/stable/c/5c7858adada31dbed042448cff6997dd6efc472a","https://git.kernel.org/stable/c/605d9fb9556f8f5fb4566f4df1480f280f308ded","https://git.kernel.org/stable/c/761db46b29b496946046d8cb33c7ea6de6bef36e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2023-52730","score":0.00251,"percentile":0.16504,"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."]}