{"cve":"CVE-2023-52531","nvd":{"published":"2024-03-02T22:15:48.613","modified":"2026-06-17T06:42:56.930","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: Fix a memory corruption issue\n\nA few lines above, space is kzalloc()'ed for:\n\tsizeof(struct iwl_nvm_data) +\n\tsizeof(struct ieee80211_channel) +\n\tsizeof(struct ieee80211_rate)\n\n'mvm->nvm_data' is a 'struct iwl_nvm_data', so it is fine.\n\nAt the end of this structure, there is the 'channels' flex array.\nEach element is of type 'struct ieee80211_channel'.\nSo only 1 element is allocated in this array.\n\nWhen doing:\n  mvm->nvm_data->bands[0].channels = mvm->nvm_data->channels;\nWe point at the first element of the 'channels' flex array.\nSo this is fine.\n\nHowever, when doing:\n  mvm->nvm_data->bands[0].bitrates =\n\t\t\t(void *)((u8 *)mvm->nvm_data->channels + 1);\nbecause of the \"(u8 *)\" cast, we add only 1 to the address of the beginning\nof the flex array.\n\nIt is likely that we want point at the 'struct ieee80211_rate' allocated\njust after.\n\nRemove the spurious casting so that the pointer arithmetic works as\nexpected.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0","https://git.kernel.org/stable/c/7c8faa31080342aec4903c9acb20caf82fcca1ef","https://git.kernel.org/stable/c/8ba438ef3cacc4808a63ed0ce24d4f0942cfe55d","https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128","https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2023-52531","score":0.00237,"percentile":0.14734,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}