USN-8973-1: libmspack vulnerability

Published Nov 3, 2026
·
Updated

It was discovered that libmspack did not properly initialize pointers when handling errors while reading KWAJ archive headers. An attacker could possibly use this issue to cause libmspack to crash, resulting in a denial of service, or execute arbitrary code.

Affected Software

12 affected componentsFixes available
All of the following
ubuntu/libmspack0t64<0.11-1.1ubuntu0.26.10.1
0.11-1.1ubuntu0.26.10.1
Ubuntu Ubuntu=26.10
All of the following
ubuntu/libmspack0t64<0.11-1.1ubuntu0.26.04.1
0.11-1.1ubuntu0.26.04.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/libmspack0t64<0.11-1.1ubuntu0.24.04.1
0.11-1.1ubuntu0.24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/libmspack0<0.10.1-2ubuntu0.1
0.10.1-2ubuntu0.1
Ubuntu Ubuntu=22.04
ubuntu/libmspack<0.10.1-2ubuntu0.1
0.10.1-2ubuntu0.1
ubuntu/libmspack<0.11-1.1ubuntu0.24.04.1
0.11-1.1ubuntu0.24.04.1
ubuntu/libmspack<0.11-1.1ubuntu0.26.10.1
0.11-1.1ubuntu0.26.10.1
ubuntu/libmspack<0.11-1.1ubuntu0.26.04.1
0.11-1.1ubuntu0.26.04.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/libmspack0t64 to a version that resolves this vulnerability.

    Fixed in 0.11-1.1ubuntu0.26.10.1
  2. Upgrade

    Upgrade ubuntu/libmspack0t64 to a version that resolves this vulnerability.

    Fixed in 0.11-1.1ubuntu0.26.04.1
  3. Upgrade

    Upgrade ubuntu/libmspack0t64 to a version that resolves this vulnerability.

    Fixed in 0.11-1.1ubuntu0.24.04.1
  4. Upgrade

    Upgrade ubuntu/libmspack0 to a version that resolves this vulnerability.

    Fixed in 0.10.1-2ubuntu0.1
  5. Upgrade

    Upgrade ubuntu/libmspack to a version that resolves this vulnerability.

    Fixed in 0.10.1-2ubuntu0.1
  6. Upgrade

    Upgrade ubuntu/libmspack to a version that resolves this vulnerability.

    Fixed in 0.11-1.1ubuntu0.24.04.1
  7. Upgrade

    Upgrade ubuntu/libmspack to a version that resolves this vulnerability.

    Fixed in 0.11-1.1ubuntu0.26.10.1
  8. Upgrade

    Upgrade ubuntu/libmspack to a version that resolves this vulnerability.

    Fixed in 0.11-1.1ubuntu0.26.04.1

Event History

Nov 3, 2026
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software
Advisory Published
via OSV·02:42 PM
Data Sourced
via OSV·02:42 PM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

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