CVE-2025-68351

// This is a kernel-level vulnerability that requires local access // No public PoC available. The vulnerability is triggered through // normal file system operations on exfat partitions. #include <stdio.h> /* * Note: This vulnerability is in the Linux kernel exfat driver. * Triggering requires: * 1. A system with exfat filesystem mounted * 2. Local access with low privileges * 3. File system operations that call exfat_find * * The actual exploitation involves: * - Creating/manipulating files on exfat partition * - Causing exfat_find to be called with specific conditions * - Triggering the refcount leak path * * This is a resource management bug, not directly exploitable * for code execution. It leads to DoS through resource exhaustion. */ int main() { printf("CVE-2025-68351 PoC - Kernel exfat refcount leak\n"); printf("This requires kernel debugging/exploitation framework\n"); printf("Not directly exploitable from user space\n"); return 0; }

{"cve": {"id": "CVE-2025-68351", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2025-12-24T11:15:58.447", "lastModified": "2026-02-26T15:53:25.697", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: fix refcount leak in exfat_find\n\nFix refcount leaks in `exfat_find` related to `exfat_get_dentry_set`.\n\nFunction `exfat_get_dentry_set` would increase the reference counter of\n`es->bh` on success. Therefore, `exfat_put_dentry_set` must be called\nafter `exfat_get_dentry_set` to ensure refcount consistency. This patch\nrelocate two checks to avoid possible leaks."}], "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": "NVD-CWE-Other"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.23", "versionEndExcluding": "6.12.68", "matchCriteriaId": "28943D23-3250-40EE-B96D-D85863D638ED"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.59", "versionEndExcluding": "6.13", "matchCriteriaId": "1323075B-EB55-4141-B0AB-902D5B5D1EC2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13.11", "versionEndExcluding": "6.14", "matchCriteriaId": "124AE182-7E9F-4410-9E08-5976ED49C6A4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.1", "versionEndExcluding": "6.18.2", "matchCriteriaId": "8B01DCEF-D70D-4DFC-B763-72CBBD6EC614"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:-:*:*:*:*:*:*", "matchCriteriaId": "7DE421BA-0600-4401-A175-73CAB6A6FB4E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc6:*:*:*:*:*:*", "matchCriteriaId": "1759FFB7-531C-41B1-9AE1-FD3D80E0D920"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc7:*:*:*:*:*:*", "matchCriteriaId": "AD948719-8628-4421-A340-1066314BBD4A"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9aee8de970f18c2aaaa348e3de86c38e2d956c1d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/d009ff8959d28d2a33aeb96a5f7e7161c421d78f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/fc9ce762525e73438d31b613f18bca92a4d3d578", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}