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CVE-2026-85091VulnerabilityPublished Updated

Bundesamt für Sicherheit in der Informationstechnik Debian · zlib: Schwachstelle ermöglicht Denial of Service und Integritätsverlust

Affects Bundesamt für Sicherheit in der Informationstechnik DebianSource GCVE Database

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Not known to be exploited.

Data as of 9 Nov 2026, 13:47 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

AI-suggested

Apply the official security updates provided by Ubuntu for the zlib packages as listed in the advisory USN-8954-1. A standard system update will install the necessary fixes. No additional mitigation steps are required beyond applying these updates.

Description

A vulnerability in the zlib compression library allows specially crafted input to trigger a heap buffer overflow. This flaw can lead to denial of service or arbitrary code execution. The issue arises from incorrect handling of certain non-blocking write operations. Fixed package versions have been released for multiple Ubuntu releases.

References

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