CVE-2026-41163
HighCVSS 7.0Exploitation Probability (EPSS)
Low risk19th percentile - higher than 19% of all known CVEs
Summary
bubblewrap is a low-level unprivileged sandboxing tool. From version 0.11.0 to before version 0.11.2, if bubblewrap is installed in setuid mode then the user can use ptrace to attach to bubblewrap and control the unprivileged part of the sandbox setup phase. This allows the attacker to arbitrarily use the privileged operations, and in particular the "overlay mount" operation, allowing the creation of overlay mounts which is otherwise not allowed in the setuid version of bubblewrap. This issue has been patched in version 0.11.2.
Risk Assessment
An attacker can escalate privileges and perform operations reserved for the administrator, leading to full system compromise.
Recommendation
Update bubblewrap to version 0.11.2 or later. If an update is not possible, consider disabling setuid mode.
Other vulnerabilities in bubblewrap
See all- CVE-2016-8659High
Bubblewrap before 0.1.3 sets the PR_SET_DUMPABLE flag, which might allow local users to gain privileges by attaching to the process, as demonstrated by sending commands to a PrivSep socket.
- CVE-2017-5226Critical
CVE-2017-5226 allows a nonprivileged session to escape the bubblewrap sandbox by using the TIOCSTI ioctl to push characters into the terminal's input buffer.
Original NVD description (English source)
bubblewrap is a low-level unprivileged sandboxing tool. From version 0.11.0 to before version 0.11.2, if bubblewrap is installed in setuid mode then the user can use ptrace to attach to bubblewrap and control the unprivileged part of the sandbox setup phase. This allows the attacker to arbitrarily use the privileged operations, and in particular the "overlay mount" operation, allowing the creation of overlay mounts which is otherwise not allowed in the setuid version of bubblewrap. This issue has been patched in version 0.11.2.