Integer overflow in the queue_init function in unsquashfs.c in unsquashfs in Squashfs 4.2 and earlier allows remote attackers to execute ar…

published 2012-07-19 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-3969

cvss: 6.8; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.9%; EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits: 0; none known

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.

Patch / fix

distros 2

debian opensuse

squashfs-tools Debian 14, Debian 13, Debian 12 1:4.2+20121212-1

debian advisories DEBIAN-CVE-2012-4025

squashfs openSUSE Tumbleweed 4.3-9.3

opensuse advisories openSUSE-SU-2024:10201-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-4025 updated 2026-11-05 cvss 5.1

squashfs-tools: integer overflow in queue_init() may lead to abitrary code execution

Red Hat Enterprise Linux 6 squashfs-tools
affected: no fix planned “Will not fix”
Red Hat Enterprise Linux 5 squashfs-tools
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.90% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-190 Integer Overflow or Wraparound

References

security.gentoo.org /glsa/201612-40
vendor-advisory, third-party-advisory
mandriva.com /security/advisories?name=MDVSA-2013:128
vendor-advisory, not-applicable
openwall.com /lists/oss-security/2012/07/19/6
mailing-list
osvdb.org /83899
vdb-entry, broken-link
wiki.mageia.org /en/Support/Advisories/MGASA-2013-0001
third-party-advisory
sourceforge.net /mailarchive/forum.php?thread_name=CAAoG81HL9oP8roPLLhftTSXTzSD%2BZcR66PRkVU%3Df76W3Mjde_w%40mail.gmail.com&fo
third-party-advisory
securityfocus.com /bid/54610
vdb-entry, third-party-advisory

Sources

CVE List CVE-2012-4025
NVD CVE-2012-4025

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary