CVE-2026-62423: buffer overruns in libfsimage iso9660 handling
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]
The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them:
The directory loop itself assumes a good record length. This is CVE-2026-42494.
The calculation of the System Use area may underflow. This is CVE-2026-42495.
The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423.
The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424.
The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62423?
CVE-2026-62423 has a risk score of 65, indicating it is moderately severe.
What is CVE-2026-62423 about?
CVE-2026-62423 pertains to buffer overruns in libfsimage's iso9660 handling due to lack of validation on attacker-controlled lengths.
How do I fix CVE-2026-62423?
To fix CVE-2026-62423, ensure you are using the latest version of libfsimage that addresses this vulnerability.
Who is affected by CVE-2026-62423?
Users and systems utilizing the libfsimage iso9660 driver are affected by CVE-2026-62423.
What are the risks associated with CVE-2026-62423?
CVE-2026-62423 can lead to potential buffer overflow exploits, resulting in arbitrary code execution or crashes.