{"id":"CVE-2023-53524","summary":"wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf\n\nAn integer overflow occurs in the iwl_write_to_user_buf() function,\nwhich is called by the iwl_dbgfs_monitor_data_read() function.\n\nstatic bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count,\n\t\t\t\t  void *buf, ssize_t *size,\n\t\t\t\t  ssize_t *bytes_copied)\n{\n\tint buf_size_left = count - *bytes_copied;\n\n\tbuf_size_left = buf_size_left - (buf_size_left % sizeof(u32));\n\tif (*size \u003e buf_size_left)\n\t\t*size = buf_size_left;\n\nIf the user passes a SIZE_MAX value to the \"ssize_t count\" parameter,\nthe ssize_t count parameter is assigned to \"int buf_size_left\".\nThen compare \"*size\" with \"buf_size_left\" . Here, \"buf_size_left\" is a\nnegative number, so \"*size\" is assigned \"buf_size_left\" and goes into\nthe third argument of the copy_to_user function, causing a heap overflow.\n\nThis is not a security vulnerability because iwl_dbgfs_monitor_data_read()\nis a debugfs operation with 0400 privileges.","modified":"2026-04-02T09:44:22.857746Z","published":"2025-10-01T11:46:10.397Z","related":["SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3761-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53524.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53524.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53524"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436"},{"fixed":"0ad8dd870aa187d0c21d032bb2c6433559075eec"},{"fixed":"059e426d666a41e26b184c177c1ca3ee2d6fa1b6"},{"fixed":"82f877ec9b041edc4c7c509c605cc3393d837bf0"},{"fixed":"eb1ef44efac797b384d361a76e33f77027c29a14"},{"fixed":"de78456976026102babe66258c228691ca5677c0"},{"fixed":"58d1b717879bfeabe09b35e41ad667c79933eb2e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53524.json"}}],"schema_version":"1.7.5"}