CVE-2026-12087: Socket versions before 2.041 for Perl have an out-of-bounds heap read

criticalCVSS 9.1CVE-2026-12087

CSIRTS triage

vendor: Perl product: SocketOtheraffected: before 2.041

What: This vulnerability involves an out-of-bounds heap read.
Who is affected: Users of Socket versions before 2.041 are affected.
Urgency: Remediation is critical due to a high severity rating.
Action: Upgrade to Socket version 2.041 or later.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.1
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-12087

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-120870.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-12087	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownUSN-8675-1: Perl vulnerabilitiesubuntu
unknownNCSC-2026-0321 [1.00] [M/H] Multiple vulnerabilities fixed in IBM AIX and IBM PowerVM VIOSncsc-nl
high[NEW] [high] IBM AIX and VIOS: Multiple vulnerabilitiescert-bund

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