CVE-2026-43267

/* * PoC Concept for CVE-2026-43267 * This is a simulation of the condition that triggers the vulnerability. * Real exploitation requires specific hardware (rtw89) and kernel context. */ #include <stdio.h> struct cfg80211_bss_conf { int beacon_int; }; void vulnerable_function(struct cfg80211_bss_conf *bss_conf) { // Simulating the logic in rtw89 driver before patch // If beacon_int is 0, this causes a crash int result = 1000 / bss_conf->beacon_int; printf("Calculation result: %d\n", result); } int main() { struct cfg80211_bss_conf conf; conf.beacon_int = 0; // Setting zero to trigger the crash printf("Attempting to trigger division by zero...\n"); vulnerable_function(&conf); return 0; }

{"cve": {"id": "CVE-2026-43267", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-06T12:16:47.810", "lastModified": "2026-05-08T21:03:42.570", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: fix potential zero beacon interval in beacon tracking\n\nDuring fuzz testing, it was discovered that bss_conf->beacon_int\nmight be zero, which could result in a division by zero error in\nsubsequent calculations. Set a default value of 100 TU if the\ninterval is zero to ensure stability."}], "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-369"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.18.16", "matchCriteriaId": "E0D300DB-AA68-4962-981D-EF9F5E97AACF"}, {"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/1260bee01493126cf9c872b6ca2af261173baa6d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/e00c9a4ec84c0bb067833b34202f457badbbc1c1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/eb57be32f438c57c88d6ce756101c1dfbcc03bba", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}