CVE-2026-42495
MediumCVSS 5.5Summary
In the libfsimage iso9660 driver, the calculation of the System Use area may underflow. An attacker can control on-disk values leading to this error.
Risk Assessment
Underflow could lead to incorrect memory access, potentially enabling code execution or system crash.
Recommendation
Update libfsimage to a version containing fixes for these vulnerabilities.
Other vulnerabilities in libfsimage
See all- CVE-2026-62425Medium
In the libfsimage iso9660 driver, the Rock Ridge CE record processing assumes a good size and offset without validation. An attacker can control these values on disk.
- CVE-2026-62424Medium
In the libfsimage iso9660 driver, the Rock Ridge NM record processing assumes a good entry length without validation. An attacker can control this value on disk.
- CVE-2026-62423Medium
In the libfsimage iso9660 driver, the Rock Ridge extension loop assumes a good inner record length without validation. An attacker can control this value on disk.
- CVE-2026-42494Medium
In the libfsimage iso9660 driver, the directory loop assumes a good record length without validation. An attacker can control this value on disk.
Original NVD description (English source)
[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.