CVE-2023-52531
Vulnerability from cvelistv5
Published
2024-03-02 21:52
Modified
2024-11-04 14:48
Severity ?
Summary
wifi: iwlwifi: mvm: Fix a memory corruption issue
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c8faa31080342aec4903c9acb20caf82fcca1ef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ba438ef3cacc4808a63ed0ce24d4f0942cfe55d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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          "value": "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()\u0027ed for:\n\tsizeof(struct iwl_nvm_data) +\n\tsizeof(struct ieee80211_channel) +\n\tsizeof(struct ieee80211_rate)\n\n\u0027mvm-\u003envm_data\u0027 is a \u0027struct iwl_nvm_data\u0027, so it is fine.\n\nAt the end of this structure, there is the \u0027channels\u0027 flex array.\nEach element is of type \u0027struct ieee80211_channel\u0027.\nSo only 1 element is allocated in this array.\n\nWhen doing:\n  mvm-\u003envm_data-\u003ebands[0].channels = mvm-\u003envm_data-\u003echannels;\nWe point at the first element of the \u0027channels\u0027 flex array.\nSo this is fine.\n\nHowever, when doing:\n  mvm-\u003envm_data-\u003ebands[0].bitrates =\n\t\t\t(void *)((u8 *)mvm-\u003envm_data-\u003echannels + 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 \u0027struct ieee80211_rate\u0027 allocated\njust after.\n\nRemove the spurious casting so that the pointer arithmetic works as\nexpected."
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    "datePublished": "2024-03-02T21:52:35.664Z",
    "dateReserved": "2024-02-20T12:30:33.319Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52531\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-02T22:15:48.613\",\"lastModified\":\"2024-03-04T13:58:23.447\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"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()\u0027ed for:\\n\\tsizeof(struct iwl_nvm_data) +\\n\\tsizeof(struct ieee80211_channel) +\\n\\tsizeof(struct ieee80211_rate)\\n\\n\u0027mvm-\u003envm_data\u0027 is a \u0027struct iwl_nvm_data\u0027, so it is fine.\\n\\nAt the end of this structure, there is the \u0027channels\u0027 flex array.\\nEach element is of type \u0027struct ieee80211_channel\u0027.\\nSo only 1 element is allocated in this array.\\n\\nWhen doing:\\n  mvm-\u003envm_data-\u003ebands[0].channels = mvm-\u003envm_data-\u003echannels;\\nWe point at the first element of the \u0027channels\u0027 flex array.\\nSo this is fine.\\n\\nHowever, when doing:\\n  mvm-\u003envm_data-\u003ebands[0].bitrates =\\n\\t\\t\\t(void *)((u8 *)mvm-\u003envm_data-\u003echannels + 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 \u0027struct ieee80211_rate\u0027 allocated\\njust after.\\n\\nRemove the spurious casting so that the pointer arithmetic works as\\nexpected.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: iwlwifi: mvm: soluciona un problema de corrupci\u00f3n de memoria Unas pocas l\u00edneas arriba, se kzalloc()\u0027ed espacio para: sizeof(struct iwl_nvm_data) + sizeof(struct ieee80211_channel) + sizeof (struct ieee80211_rate) \u0027mvm-\u0026gt;nvm_data\u0027 es una \u0027struct iwl_nvm_data\u0027, por lo que est\u00e1 bien. Al final de esta estructura, se encuentra la matriz flexible de \u0027canales\u0027. Cada elemento es de tipo \u0027struct ieee80211_channel\u0027. Entonces solo se asigna 1 elemento en esta matriz. Al hacer: mvm-\u0026gt;nvm_data-\u0026gt;bands[0].channels = mvm-\u0026gt;nvm_data-\u0026gt;channels; Apuntamos al primer elemento de la matriz flexible \u0027canales\u0027. Entonces esto est\u00e1 bien. Sin embargo, al hacer: mvm-\u0026gt;nvm_data-\u0026gt;bands[0].bitrates = (void *)((u8 *)mvm-\u0026gt;nvm_data-\u0026gt;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 \u0027estructura ieee80211_rate\u0027 asignada justo despu\u00e9s. Retire la fundici\u00f3n espuria para que la aritm\u00e9tica del puntero funcione como se esperaba.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c8faa31080342aec4903c9acb20caf82fcca1ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8ba438ef3cacc4808a63ed0ce24d4f0942cfe55d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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