6.3

CVE-2026-110602: kyz libmspack Access of Uninitialized Pointer

CVSS: 6.3v3.1MediumDeferred
AliasesDEBIAN-CVE-2026-110602UBUNTU-CVE-2026-110602
Published 14-10-2026Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2026-110602 is a medium (CVSS 6.3) Access of Uninitialized Pointer vulnerability in kyz libmspack. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 13.4% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-10-2026
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

libmspack through 0.11alpha contains an uninitialized pointer free vulnerability in kwajd_open() in mspack/kwajd.c that frees unzeroed filename and extra pointers on header read errors. Attackers can supply a truncated, empty, or wrong-signature KWAJ file to crash the process or obtain an arbitrary-free memory corruption primitive.

CVSS metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

15-10-202618-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu2 products
  • clamavAll versions (No fix recorded)
  • libmspackAll versions (No fix recorded)
Debian1 product
  • libmspackAll versions (No fix recorded)
Kyz1 product

3 vendors · 4 products

References

7 links