CVE-2026-27456VulnerabilityPublished 22 Jun 2026Updated 12 Oct 2026

SUSE · Security update for util-linux

Affects SUSESource GCVE Database

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Not known to be exploited.

Data as of 5 Nov 2026, 00:01 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 22 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

A security update has been released by SUSE that addresses this vulnerability. Applying the official patch to the affected util-linux packages is the recommended remediation. No additional mitigation steps are indicated or required according to the vendor advisory.

Description

A medium severity time-of-check to time-of-use (TOCTOU) vulnerability exists in the mount program of util-linux related to loop device setup. This issue, tracked as CVE-2026-27456, was identified by the SUSE Product Security Team. A security update addressing this vulnerability is available for specific SUSE packages on the aarch64 architecture. No known exploits have been reported in the wild.

Impact

The vulnerability could allow an attacker to exploit the race condition in loop device setup, potentially leading to unauthorized actions or privilege escalation. However, no active exploitation in the wild has been reported. The severity is assessed as medium, indicating a moderate risk if exploited.

Summary

CVE-2026-27456 is a TOCTOU vulnerability in the mount program of util-linux affecting the setup of loop devices. The flaw allows a race condition between checking and using resources, potentially leading to unexpected behavior or privilege escalation. The SUSE Product Security Team discovered this issue and released a security update that fixes the vulnerability in affected packages including lastlog2, libblkid1, and libfdisk1 for the aarch64 architecture.

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 12 Oct 2026, 22:39 UTC

Technical details

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