Description
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf An integer overflow occurs in the iwl_write_to_user_buf() function, which is called by the iwl_dbgfs_monitor_data_read() function. static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count, void *buf, ssize_t *size, ssize_t *bytes_copied) { int buf_size_left = count - *bytes_copied; buf_size_left = buf_size_left - (buf_size_left % sizeof(u32)); if (*size > buf_size_left) *size = buf_size_left; If the user passes a SIZE_MAX value to the "ssize_t count" parameter, the ssize_t count parameter is assigned to "int buf_size_left". Then compare "*size" with "buf_size_left" . Here, "buf_size_left" is a negative number, so "*size" is assigned "buf_size_left" and goes into the third argument of the copy_to_user function, causing a heap overflow. This is not a security vulnerability because iwl_dbgfs_monitor_data_read() is a debugfs operation with 0400 privileges.
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0ad8dd870aa187d0c21d032bb2c6433559075eec
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 059e426d666a41e26b184c177c1ca3ee2d6fa1b6
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 82f877ec9b041edc4c7c509c605cc3393d837bf0
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before eb1ef44efac797b384d361a76e33f77027c29a14
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before de78456976026102babe66258c228691ca5677c0
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 58d1b717879bfeabe09b35e41ad667c79933eb2e
5.4.244
5.10.181
5.15.113
6.1.30
6.3.4
6.4
References
git.kernel.org/...c/0ad8dd870aa187d0c21d032bb2c6433559075eec
git.kernel.org/...c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6
git.kernel.org/...c/82f877ec9b041edc4c7c509c605cc3393d837bf0
git.kernel.org/...c/eb1ef44efac797b384d361a76e33f77027c29a14
git.kernel.org/...c/de78456976026102babe66258c228691ca5677c0
git.kernel.org/...c/58d1b717879bfeabe09b35e41ad667c79933eb2e
