CVE-2025-71273

/* * PoC Concept for CVE-2025-71273 * Demonstrates the memory leak logic in the rtw88 driver. */ #include <linux/module.h> #include <linux/slab.h> // Simulated structure for the device struct rtw_dev { void *supported_band; }; // Vulnerable function simulation int vulnerable_rtw_set_supported_band(struct rtw_dev *rtwdev) { // Allocation happens here (vulnerable point) rtwdev->supported_band = kmalloc(1024, GFP_KERNEL); if (!rtwdev->supported_band) return -ENOMEM; return 0; } // Vulnerable path simulation int vulnerable_rtw_register_hw(struct rtw_dev *rtwdev) { int ret = vulnerable_rtw_set_supported_band(rtwdev); if (ret) return ret; // Success path returns 0 // Simulate an error occurring after allocation // The function returns error, but 'supported_band' is not freed. return -ENODEV; } // Exploitation: Repeatedly calling the init function that fails // will leak 1024 bytes each time.

{"cve": {"id": "CVE-2025-71273", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:27.330", "lastModified": "2026-05-12T21:27:31.877", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw88: Use devm_kmemdup() in rtw_set_supported_band()\n\nSimplify the code by using device managed memory allocations.\n\nThis also fixes a memory leak in rtw_register_hw(). The supported bands\nwere not freed in the error path.\n\nCopied from commit 145df52a8671 (\"wifi: rtw89: Convert\nrtw89_core_set_supported_band to use devm_*\")."}], "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": "5.6", "versionEndExcluding": "6.12.75", "matchCriteriaId": "168F1117-B247-4CC5-B097-132EE9E96FDD"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1bd90e0a99fdc8dc5deb3c92bf865e4496b4b311", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/2ba12401cc1f2d970fa2e7d5b15abde3f5abd40d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9b5418070ee8468fac9e8bf641c83d46b85bff30", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/ad9b80ee310ed734482a2e5da874b67f88ac0ef8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}