{"id":"CVE-2023-53524","title":"wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < 0ad8dd870aa187d0c21d032bb2c6433559075eec","Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < 059e426d666a41e26b184c177c1ca3ee2d6fa1b6","Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < 82f877ec9b041edc4c7c509c605cc3393d837bf0","Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < eb1ef44efac797b384d361a76e33f77027c29a14","Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < de78456976026102babe66258c228691ca5677c0","Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < 58d1b717879bfeabe09b35e41ad667c79933eb2e","Linux 5.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:23:14.529998Z"},"published":"2025-10-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:31:13.586Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53524","references":[{"url":"https://git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec"},{"url":"https://git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6"},{"url":"https://git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0"},{"url":"https://git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14"},{"url":"https://git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0"},{"url":"https://git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e"}],"tags":["cve.org"],"epss":0.00173,"epssPercentile":0.06778,"ingestedAt":"2026-11-05T22:38:31.808Z","slug":"CVE-2023-53524","body":"## Overview\n\nIn 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 > 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.\n\n## Affected\n\n- `Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < 0ad8dd870aa187d0c21d032bb2c6433559075eec`\n- `Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < 059e426d666a41e26b184c177c1ca3ee2d6fa1b6`\n- `Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < 82f877ec9b041edc4c7c509c605cc3393d837bf0`\n- `Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < eb1ef44efac797b384d361a76e33f77027c29a14`\n- `Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < de78456976026102babe66258c228691ca5677c0`\n- `Linux >= f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 < 58d1b717879bfeabe09b35e41ad667c79933eb2e`\n- `Linux 5.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}