Lukas Schauer

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** The issue is related to a regression introduced by a commit that added general notification queue support, which caused resized pipes to lock up under certain conditions. This occurred because the commit resizing the pipe ring size was moved to a different function, resulting in the wakeup for `pipe->wr wait` being triggered before actually raising `pipe->max usage`. If a pipe was full before the resize occurred, it would result in the wakeup never actually triggering `pipe write`. The vulnerability is associated with incorrect blocking in the `pipe resize ring()` and `pipe set size()` functions in `fs/pipe.c`. Exploitation of this vulnerability could allow an attacker to cause a denial of service. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** ghostscript versions 9.x before 9.50 **Description** A flaw in the `.charkeys` procedure of ghostscript allows scripts to bypass `-dSAFER` restrictions by not properly securing its privileged calls. This enables an attacker to create a specially crafted PostScript file that could escalate privileges within Ghostscript, access files outside of restricted areas, or execute commands. The exploitation of this flaw may allow a remote attacker to access confidential data, compromise its integrity, and cause a denial of service. **Recommendations** For ghostscript versions 9.x before 9.50, update to version 9.50 or later to resolve the issue. As a temporary workaround, consider restricting access to the `.charkeys` procedure to minimize the risk of exploitation. Avoid using the `-dSAFER` restrictions in affected versions until the issue is resolved.