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TI-2026-10412 Aliases CVE-2026-12087GHSA-q5cv-5vf6-95gp

Out-of-bounds read in PEVANS Socket

Priority MEDIUM 46CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
Partial Red Hat: 1 fixed, 5 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

Socket versions before 2.041 for Perl have an out-of-bounds heap read. In Socket.xs, pack_ip_mreq_source() checks the length of its source argument before the argument is read, so the check tests the byte length carried over from the preceding multiaddr argument instead. Both addresses occupy a 4-byte field, so a valid multiaddr lets a source of any length pass the check, and the source is then copied into the 4-byte imr_sourceaddr field with a fixed-size copy. A source shorter than 4 bytes is not rejected, and the copy reads up to 3 bytes past the end of its buffer. Calling pack_ip_mreq_source() with a source value shorter than 4 bytes copies adjacent heap memory into the returned packed structure.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00574 47th percentileScored 2026-11-07
Fix Partial Socket (PEVANS): 2.041Red Hat: 1 advisoryRed Hat: 1 fixed, 5 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PEVANSSocketbefore 2.0412.041Patch availableCNA
  • Socket VendorPEVANS Affected before 2.041 Fixed in 2.041 Patch available CNA

Remediation

  • Fix · CNA Socket (PEVANS) Fixed in 2.041

Red Hat 1 advisory

  • RHSA-2026:11342 Released 2026-04-28 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images perl-Socket-2.041-1.hum1@aarch64, perl-Socket-2.041-1.hum1@src, perl-Socket-2.041-1.hum1@x86_64 +2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:11342

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-12087
  2. 2026-10-03 Alias added: GHSA-q5cv-5vf6-95gp
  3. 2026-11-06 Fix available: RHSA-2026:11342 · Red Hat

References

Patch 1

Other 1

  • TI-2026-37327 Metrics::Any::Adapter::Statsd versions before 0.04 for Perl does not protect against… CVSS 3.1HIGH 8.2
  • TI-2026-37328 Metrics::Any::Adapter::DogStatsd versions before 0.04 for Perl does not protect against… CVSS 3.1CRITICAL 9.1
  • TI-2026-37329 Metrics::Any::Adapter::SignalFx versions before 0.04 for Perl does not protect against… CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences