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a8b23da63e
- CVE-2026-53613
A TOCTOU vulnerability exists in the SUID binary /usr/bin/mount from
util-linux. When processing restricted (non-root) mount requests,
libmount validates the mount target against /etc/fstab entries and
checks user permissions, but the actual mount()/move_mount() syscall
re-resolves the target pathname. An attacker can use
renameat2(RENAME_EXCHANGE) to atomically swap an ancestor directory
of the mount target between the permission check and the mount
syscall, redirecting an authorized user-directory mount to any
root-owned path (e.g., /etc/sudoers.d).
For more information, see:
- https://github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-72r3-428g
- b639bf5c42
- 0b010025a0
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
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