VulnSocial

CVE-2023-6816Disclosure(debian / debian_linux)

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.

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1.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-787

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • debian_linux
  • enterprise_linux_desktop
  • enterprise_linux_server
  • enterprise_linux_workstation

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
debianfedoraprojectredhatx.org
Products
debian_linuxenterprise_linux_desktopenterprise_linux_serverenterprise_linux_workstationfedorax_serverxwayland

3 versions affected across 7 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-03-19: 1Technical Details · 2026-03-19: 103-19
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • 0day Signal@0dayPublishing
    Disclosure

    🚨 CVE-2023-6816: Xorg-x11-server: heap buffer over... X11's button mapping logic allocates heap space for device button count but accepts arbitrary values up to 255—classic i... https://zerodaysignal.com/vulnerability/CVE-2023-6816 #netsec #vulnerability #CVE #sysadmin #zeroday

    Post summary

    The tweet announces CVE-2023-6816, describing a heap buffer overflow in Xorg-x11-server and linking to a vulnerability page, but does not share PoC, exploit code, patch, or active exploitation evidence.

    0000085
    154 followersView on X
CPE platform detail7 entries

7 of 7 entries

PartVendorProductVersionTarget SWTarget HW
OSdebiandebian_linux10.0--
OSfedoraprojectfedora39--
OSredhatenterprise_linux_desktop7.0--
OSredhatenterprise_linux_server7.0--
OSredhatenterprise_linux_workstation7.0--
Appx.orgx_server---
Appx.orgxwayland---

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