VulnSocial

CVE-2026-88807Patch

LOWCVSS 8.9 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.

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0.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-122

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-09-23); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-09-23: 1Mentions · 2026-10-13: 1Patch / Workaround · 2026-09-23: 1Technical Details · 2026-09-23: 1Technical Details · 2026-10-13: 109-2310-13
Signal classification2 categories
Patch
150.0%
Disclosure
150.0%
Referenced assets1 URL
By indicator
Classification over time
DateTotalLabels
2026-09-231
Patch1
2026-10-131
Disclosure1
Full discourse2 posts
  • Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters
    Disclosure

    CVE-2026-88807 libXrender heap overflow, CVSS 8.8. Malicious X servers can inject code into attached clients via RenderQueryPictFormats. No patch yet. Limit exposure now. https://www.valtersit.com/cve/CVE-2026-88807 #CVE #infosec #libXrender #libXrender #CVEALERT #CVE #infosec #Linux #XSS #valtersit #snippet #SysAdmin #cybersecurity #devsecops #devops #developer #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #cybersecurityawareness #cybersecuritynews #cybersecuritytips #python #hacker #kali #ubuntu #debian #docker

    Post summary

    The text reports CVE-2026-88807 as a libXrender heap overflow and provides technical impact details and a CVSS score. It mentions that no patch is available but gives no specific remediation, PoC, exploit tool, or evidence of active exploitation.

    0000053
    1.1K followersView on X
  • Upwind Security MDR@UpwindMDR
    Patch

    🚨HIGH - libXrender Heap Overflow via RenderQueryPictFormats Reply Parsing (CVE-2026-88807) libXrender < 0.9.13 mishandles RenderQueryPictFormats reply parsing, triggering a heap-based buffer overflow when processing a crafted X Render extension response. A malicious X server can corrupt heap memory in connected X clients, potentially leading to code execution. 👉Affected: libXrender < 0.9.13 | Upgrade to 0.9.13

    Post summary

    The tweet discloses a high-severity heap overflow vulnerability in libXrender versions prior to 0.9.13 and explicitly instructs users to upgrade to version 0.9.13 to remediate the issue.

    0000061
    309 followersView on X

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