Integer overflow in Squashfs Project

CVE-2012-4025

Integer overflow in the queue_init function in unsquashfs.c in unsquashfs in Squashfs 4.2 and earlier allows remote attackers to execute arbitrary code via a crafted block_log field in the superblock of a .sqsh file, leading to a heap-based buffer overflow.

Vulnerability class: Integer Overflow

Published 2012-07-19 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 6.8 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.039 (89.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000

Affected products

Squashfs Project

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

www.openwall.com/lists/oss-security/2012/07/19/6 (mailing-list, Mailing List)
www.osvdb.org/83899 (vdb-entry, Broken Link)
wiki.mageia.org/en/Support/Advisories/MGASA-2013-0001 (Third Party Advisory)
sourceforge.net/mailarchive/forum.php (Third Party Advisory)
www.securityfocus.com/bid/54610 (VDB Entry, Third Party Advisory, vdb-entry)
security.gentoo.org/glsa/201612-40 (vendor-advisory, Third Party Advisory)
www.mandriva.com/security/advisories (vendor-advisory, Not Applicable)