CVE-2026-53294 mailbox: mailbox-test: don't free the reused channel

In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO. This special case needs to be handled when freeing the channels otherwise a double-free occurs...

CVE-2026-53294

Technical details for CVE-2026-53294 are not publicly available in the provided documents. Monitor for updates from Debian/Ubuntu OSV entries and kernel advisories for affected components, versions, and fixes.

PT-2026-52933

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the mailbox-test component where a double-free occurs during the process of freeing channels. This happens because the RX channel can be aliased to the TX channel if i...