CVE-2017-5226: When executing a program via the bubblewrap sandbox, the nonpriv session can escape to the parent session by u

Q: How do I fix CVE-2017-5226?

bubblewrap: upgrade to newer than 0.1.5. Exact commands for each OS are on this page.

Q: Is CVE-2017-5226 being exploited?

CVE-2017-5226 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-5226 affect?

CVE-2017-5226 affects bubblewrap. Severity is critical (CVSS 10.0). When executing a program via the bubblewrap sandbox, the nonpriv session can escape to the parent session by using the TIOCSTI ioctl to push characters into the terminal's input buffer, allowing an attacker to escape the sandbox.

Q: How urgent is CVE-2017-5226?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 10.0REMOTEUPGRADE

CVE-2017-5226 is a critical-severity flaw (CVSS 10.0) affecting bubblewrap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When executing a program via the bubblewrap sandbox, the nonpriv session can escape to the parent session by using the TIOCSTI ioctl to push characters into the terminal's input buffer, allowing an attacker to escape the sandbox.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-20
Published	2017-03-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: projectatomic

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-03-29 20:59 UTCPublished CVE record published
2026-06-17 01:20 UTCUpdated Record last modified

projectatomic bubblewrap UPGRADE

Affected: <= 0.1.5

Fixed in: newer than 0.1.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bubblewrap || rpm -q bubblewrap || bubblewrap --version

2. UPGRADE to newer than 0.1.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bubblewrap

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bubblewrap

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-5226?

bubblewrap: upgrade to newer than 0.1.5. Exact commands for each OS are on this page.

Is CVE-2017-5226 being exploited?

CVE-2017-5226 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-5226 affect?

CVE-2017-5226 affects bubblewrap. Severity is critical (CVSS 10.0). When executing a program via the bubblewrap sandbox, the nonpriv session can escape to the parent session by using the TIOCSTI ioctl to push characters into the terminal's input buffer, allowing an attacker to escape the sandbox.

How urgent is CVE-2017-5226?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-5291 HIGH 7.2 UPGRADE MITIGATE Bubblewrap (bwrap) before version 0.4.1, if installed in setuid mode and the kernel supports unprivileged user
CVE-2019-12439 HIGH 7.4 UPGRADE bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point
CVE-2016-8659 HIGH 7.0 UPGRADE Bubblewrap before 0.1.3 sets the PR_SET_DUMPABLE flag, which might allow local users to gain privileges by att

References

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