Security readout for executives and security teams
This flaw affects X.org libX11 before 1.6.4. A malicious or compromised remote X server may abuse how an X client handles image data, potentially causing out-of-bounds reads and privilege impact. Risk is highest where users run X11 applications against untrusted or remote X servers. Exposure is likely on older Unix/Linux desktop or server systems with X.org libX11 before 1.6.4, especially where X11 forwarding, remote X sessions, or untrusted X servers are used. Systems with updated distro packages are likely already remediated. Treat as a moderate legacy exposure issue. It is not listed as known exploited in the provided sources, but outdated X11 client libraries in remote-display environments should be remediated during normal security maintenance. Mitigation focus: Update libX11 through the operating system vendor's supported security packages.; Ensure libX11 is at least 1.6.4 or vendor-backported equivalent.; Avoid connecting X11 clients to untrusted remote X servers..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2016-7942 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- USN-3758-2CVE reference · vendor-advisory, x_refsource_UBUNTU
- GLSA-201704-03CVE reference · vendor-advisory, x_refsource_GENTOO
- [xorg-announce] 20161004 X.Org security advisory: Protocol handling issues in X Window System client librariesCVE reference · mailing-list, x_refsource_MLIST
- USN-3758-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- FEDORA-2016-0df69ab477CVE reference · vendor-advisory, x_refsource_FEDORA
- https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8ea762f94f4c942d898fdeb590a1630c83235c17CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.