CVE-2023-52531

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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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/intel/iwlwifi/mvm/fw.c"], "versions": [{"version": "8ca151b568b67a7b72dcfc6ee6ea7c107ddd795c", "lessThan": "7c8faa31080342aec4903c9acb20caf82fcca1ef", "status": "affected", "versionType": "git"}, {"version": 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Al final de esta estructura, se encuentra la matriz flexible de 'canales'. Cada elemento es de tipo 'struct ieee80211_channel'. Entonces solo se asigna 1 elemento en esta matriz. Al hacer: mvm->nvm_data->bands[0].channels = mvm->nvm_data->channels; Apuntamos al primer elemento de la matriz flexible 'canales'. Entonces esto est\u00e1 bien. Sin embargo, al hacer: mvm->nvm_data->bands[0].bitrates = (void *)((u8 *)mvm->nvm_data->channels + 1); debido a la conversi\u00f3n \"(u8 *)\", agregamos solo 1 a la direcci\u00f3n del comienzo de la matriz flexible. Es probable que queramos apuntar a la 'estructura ieee80211_rate' asignada justo despu\u00e9s. Retire la fundici\u00f3n espuria para que la aritm\u00e9tica del puntero funcione como se esperaba."}], "id": "CVE-2023-52531", "lastModified": "2026-06-17T06:42:56.930", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52531", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-03-04T19:38:20.613089Z", "version": "2.0.3"}}]}, "published": "2024-03-02T22:15:48.613", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7c8faa31080342aec4903c9acb20caf82fcca1ef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8ba438ef3cacc4808a63ed0ce24d4f0942cfe55d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7c8faa31080342aec4903c9acb20caf82fcca1ef"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8ba438ef3cacc4808a63ed0ce24d4f0942cfe55d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: wifi: iwlwifi: mvm: Fix a memory corruption issue", "id": "2267786", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267786"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-400", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: iwlwifi: mvm: Fix a memory corruption issue\nA few lines above, space is kzalloc()'ed for:\nsizeof(struct iwl_nvm_data) +\nsizeof(struct ieee80211_channel) +\nsizeof(struct ieee80211_rate)\n'mvm->nvm_data' is a 'struct iwl_nvm_data', so it is fine.\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.\nWhen doing:\nmvm->nvm_data->bands[0].channels = mvm->nvm_data->channels;\nWe point at the first element of the 'channels' flex array.\nSo this is fine.\nHowever, when doing:\nmvm->nvm_data->bands[0].bitrates =\n(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.\nIt is likely that we want point at the 'struct ieee80211_rate' allocated\njust after.\nRemove the spurious casting so that the pointer arithmetic works as\nexpected."], "name": "CVE-2023-52531", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52531\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52531\nhttps://lore.kernel.org/linux-cve-announce/2024030255-CVE-2023-52531-be21@gregkh/T/#u"], "threat_severity": "Low"}

{}