A buffer overflow flaw was found in the way glibc"s gethostbyname_r and other related functions computed the size of a buffer when passed a misaligned buffer as input. An attacker able to make an application call any of these functions with a misaligned buffer could use this flaw to crash the application or, potentially, execute arbitrary code with the permissions of the user running the application. It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap . A local attacker could potentially use this flaw to execute arbitrary code on the system. It was discovered that, under certain circumstances, glibc"s getaddrinfo function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data. A stack overflow flaw was found in glibc"s swscanf function. An attacker able to make an application call the swscanf function could use this flaw to crash that application or, potentially, execute arbitrary code with the permissions of the user running the application. A heap-based buffer overflow flaw was found in glibc"s swscanf function. An attacker able to make an application call the swscanf function could use this flaw to crash that application or, potentially, execute arbitrary code with the permissions of the user running the application