CVE-2026-23285

/* * PoC Concept for CVE-2026-23285 * Triggering this requires a configured DRBD setup and inducing a read error. */ #include <stdio.h> #include <fcntl.h> #include <unistd.h> int main() { // This is a conceptual representation. // To reproduce, one would need to: // 1. Set up a DRBD device. // 2. Corrupt the backing storage or force a read error. // 3. Issue a read request to the DRBD device. // This triggers drbd_request_endio -> __req_mod with NULL peer_device. int fd = open("/dev/drbd0", O_RDONLY); if (fd < 0) { perror("Failed to open device"); return 1; } char buf[4096]; // Reading from a sector that is marked bad or simulating hardware error // would trigger the vulnerable path. read(fd, buf, sizeof(buf)); close(fd); return 0; }

{"cve": {"id": "CVE-2026-23285", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-03-25T11:16:23.247", "lastModified": "2026-05-22T00:12:09.970", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrbd: fix null-pointer dereference on local read error\n\nIn drbd_request_endio(), READ_COMPLETED_WITH_ERROR is passed to\n__req_mod() with a NULL peer_device:\n\n __req_mod(req, what, NULL, &m);\n\nThe READ_COMPLETED_WITH_ERROR handler then unconditionally passes this\nNULL peer_device to drbd_set_out_of_sync(), which dereferences it,\ncausing a null-pointer dereference.\n\nFix this by obtaining the peer_device via first_peer_device(device),\nmatching how drbd_req_destroy() handles the same situation."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrbd: corrección de desreferencia de puntero nulo en error de lectura local\n\nEn drbd_request_endio(), READ_COMPLETED_WITH_ERROR se pasa a __req_mod() con un peer_device NULO:\n\n__req_mod(req, what, NULL, &amp;m);\n\nEl gestor de READ_COMPLETED_WITH_ERROR luego pasa incondicionalmente este peer_device NULO a drbd_set_out_of_sync(), que lo desreferencia, causando una desreferencia de puntero nulo.\n\nEsto se corrige obteniendo el peer_device a través de first_peer_device(device), coincidiendo con cómo drbd_req_destroy() maneja la misma situación."}], "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": "6.4", "versionEndExcluding": "6.6.130", "matchCriteriaId": "B5DC2349-A344-41CA-9A54-55596F8AD981"}, {"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": "6.19.7", "matchCriteriaId": "69245D10-0B71-485E-80C3-A64F077004D3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0d195d3b205ca90db30d70d09d7bb6909aac178f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/1e906c08594c8f9a6a524f38ede2c4e051196106", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/4e8935053ba389ae8d6685c10854d8021931bd89", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/6f1d1614f841d91a4169db65812ffd1271735b42", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/91df51d2df0ca4fd3281f73626341563d64a98a5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}