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Security fixes: CVE-2026-53613 - mount(8) TOCTOU race on target path. The SUID mount does not pin the mount target directory, allowing a race between path resolution and the actual mount syscall. A local attacker can swap an ancestor directory component between these steps to redirect a mount to an arbitrary location. Reported-by: Xinyao Hu CVE-2026-53612 - mount(8) TOCTOU race on post-mount owner/mode change. The X-mount.owner, X-mount.group, and X-mount.mode options use path-based lchown()/chmod() after mounting. An attacker can swap the target between mount and the ownership/mode change to gain control of arbitrary files. Reported-by: Xinyao Hu CVE-2026-53614 - mount(8) SUID bypass via LIBMOUNT_FORCE_MOUNT2. The environment variable LIBMOUNT_FORCE_MOUNT2 is not filtered via safe_getenv() in SUID context. A local attacker can force the legacy mount(2) code path, which uses a two-step bind+remount or propagation sequence with a window where security flags (nosuid, noexec, ...) are not yet applied. Reported-by: Xinyao Hu Full release notes: https://www.kernel.org/pub/linux/utils/util-linux/v2.41/v2.41.5-ReleaseNotes Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at https://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches