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TI-2026-74915 Aliases CVE-2026-111131

Off-by-one stack out-of-bounds read in libxmp P61A depacker

Priority MEDIUM 64CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

libxmp through 4.7.4 has an off-by-one stack out-of-bounds read (CWE-125) in the P61A depacker, depack_p61a() in src/loaders/prowizard/p61a.c. An attacker can supply a crafted headerless P61A module with 31 samples and a 0xffe0 back-reference size word to leak stack memory into sample metadata or disrupt loading. The CVSS 4.0 base score is 6.9 (MEDIUM), CISA SSVC rates exploitation as poc, and the issue is not in CISA KEV.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

libxmp through 4.7.4 contains an off-by-one stack out-of-bounds read vulnerability in the prowizard P61A depacker depack_p61a() in src/loaders/prowizard/p61a.c. Attackers can supply a crafted headerless P61A module with 31 samples and a 0xffe0 back-reference size word to leak stack memory into sample metadata or disrupt loading.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00197 9th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
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
Libxmplibxmpup to 4.7.4—No fix listedCNA
  • libxmp VendorLibxmp Affected up to 4.7.4 Fixed in — No fix listed CNA

Remediation

No fixed version is listed for libxmp, and all versions through 4.7.4 are affected. Until a fixed release is available, avoid loading untrusted P61A modules with libxmp.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-111131
  2. 2026-10-16 Affected versions changed · Red Hat
  3. 2026-10-16 CVSS score added · Red Hat

References

Other 4

Sources

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