Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-006
Advisory Released Date: 2026-09-18
Advisory Updated Date: 2026-11-02
Severity:
Important
Issue Overview:
A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx. It is fixed in bubblewrap 0.12.0. (CVE-2026-87766)
Affected Packages:
bubblewrap
Issue Correction:
Run dnf update bubblewrap --releasever 2027.0.20260914 or dnf update --advisory ALAS2027-2026-006 --releasever 2027.0.20260914 to update your system.
New Packages:
aarch64:
bubblewrap-debuginfo-0.12.0-1.amzn2027.aarch64
bubblewrap-debugsource-0.12.0-1.amzn2027.aarch64
bubblewrap-0.12.0-1.amzn2027.aarch64
src:
bubblewrap-0.12.0-1.amzn2027.src
x86_64:
bubblewrap-debuginfo-0.12.0-1.amzn2027.x86_64
bubblewrap-debugsource-0.12.0-1.amzn2027.x86_64
bubblewrap-0.12.0-1.amzn2027.x86_64