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CVE-2026-55995: Double-free in the iSNS attribute decoder in open-iscsi

CVE-2026-55995 is a vulnerability in Double-free in the iSNS attribute decoder in open-iscsi, rated Important by Microsoft. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.25% probability of exploitation activity in the next 30 days, higher than 17% of all scored vulnerabilities. Microsoft released the fix on 6 August 2026, outside Patch Tuesday. It affects 2 products in 1 product family (Open Source Software).

Key facts

CVE ID
CVE-2026-55995
Severity
N/A
Microsoft severity
Important
Exploited in the wild
No
Publicly disclosed
No
Weakness
CWE-415
EPSS
0.25% (percentile 17%)
CISA KEV
Not listed
Released
Last updated
Patch Tuesday
July 2026 Patch Tuesday
Product families
Open Source Software

Affected products (2)

Open Source Software

ProductSecurity updateTypeFixed buildRestart
azl3 isns-utils 0.102-1 on Azure Linux 3.0CBL-Mariner ReleasesSecurity Update0.102-2No
azl3 isns-utils 0.102-2 on Azure Linux 3.0CBL-Mariner ReleasesSecurity Update0.102-2No

NIST NVD data

NVD status
Awaiting Analysis
NVD CVSS
8.7 (HIGH)
NVD weakness
CWE-415
Published to NVD
NVD last modified

References

Revision history

VersionDateDescription
1.0Information published.
2.0Information published.
3.0Information published.

Sources