https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 28 Sep 2026 06:37:06 +0000 https://vulnerability.circl.lu/vuln/cve-2026-72138 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>xen/gntdev: fix error handling in ioctl</p> <p>When gntdev_ioctl_map_grant_ref() fails to copy the operation result back to userspace after successfully adding the mapping to the list, the error path returns -EFAULT without releasing the reference acquired by gntdev_alloc_map(). The mapping remains in priv-&gt;maps with a refcount of 1, causing a memory leak and a dangling list entry.</p> <p>Additionally, gntdev_add_map() may modify map-&gt;index to avoid overlap with existing mappings. Therefore, the index returned to userspace must be obtained after gntdev_add_map() completes.</p> <p>Fix this by holding the mutex across gntdev_add_map(), retrieving the correct index, and copy_to_user(). If copy_to_user() fails, remove the mapping from the list and release the reference while still holding the lock.</p> <p>Fix these issues by properly handling all error cases.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>xen/gntdev: fix error handling in ioctl</p> <p>When gntdev_ioctl_map_grant_ref() fails to copy the operation result back to userspace after successfully adding the mapping to the list, the error path returns -EFAULT without releasing the reference acquired by gntdev_alloc_map(). The mapping remains in priv-&gt;maps with a refcount of 1, causing a memory leak and a dangling list entry.</p> <p>Additionally, gntdev_add_map() may modify map-&gt;index to avoid overlap with existing mappings. Therefore, the index returned to userspace must be obtained after gntdev_add_map() completes.</p> <p>Fix this by holding the mutex across gntdev_add_map(), retrieving the correct index, and copy_to_user(). If copy_to_user() fails, remove the mapping from the list and release the reference while still holding the lock.</p> <p>Fix these issues by properly handling all error cases.</p> https://vulnerability.circl.lu/vuln/cve-2026-72138