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CVE-2026-27171VulnerabilityPublished Updated

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

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, 14:50 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Feb 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

Affected software

ProductAffectedFixed in
Bundesamt für Sicherheit in der Informationstechnik DebianAffected
  • =7.3
Fixed in–

AI-suggested

The vulnerability is addressed by updating the zlib packages to the fixed versions provided by Ubuntu in their security advisory USN-8706-1. Applying standard system updates on affected Ubuntu releases (26.04 LTS and 24.04 LTS) will remediate the issue. Users should ensure their systems are updated to the specified package versions to mitigate the risk.

Description

A vulnerability in the zlib compression library allows an attacker to cause a denial of service by triggering excessive CPU consumption. This occurs due to improper handling of negative length parameters in the CRC32 combine functions. The issue affects certain versions of zlib used in Debian and Ubuntu systems. Updates addressing this vulnerability have been released for Ubuntu 26.04 LTS and 24.04 LTS.

References

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