Imager versions from 0.45_02 before 1.035 for Perl read outside the EXIF block via unchecked start offsets in tiff_load_ifd

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73638
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 22:17:03 UTC
Updated2026-09-22 19:16:44 UTC
DescriptionImager versions from 0.45_02 before 1.035 for Perl read outside the EXIF block via unchecked start offsets in tiff_load_ifd. tiff_load_ifd() validates an IFD entry's data by checking that `entry->offset + entry->size` stays within the EXIF block, and never checks the start offset itself. Where that sum is not the real end of the data, the check passes with the entry starting outside the block. Through 1.032 `entry->offset` is a plain int, so on the usual two's-complement implementations an offset with the high bit set converts to negative and the sum can land back inside the block. From 1.033 the field is a size_t and the addition wraps only where size_t is 32 bits. The IFD's own start offset is checked the same way and wraps where unsigned long is 32 bits, which includes 64-bit Windows. Any caller of Imager->read() on an attacker-supplied image may receive EXIF tags holding bytes from outside the block, or crash the process.

Risk And Classification

Primary CVSS: v3.1 6.2 MEDIUM from ADP

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.001410000 probability, percentile 0.038230000 (date 2026-09-23)

Problem Types: CWE-125 | CWE-125 CWE-125 Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

ReferenceSourceLinkTags
bugs.debian.org/cgi-bin/bugreport.cgi 9b29abf9-4ab0-4765-b253-1875cd9b441e bugs.debian.org
github.com/tonycoz/imager/security/advisories/GHSA-j47j-8w8p-3mmc 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
github.com/tonycoz/imager/commit/6f1fd003a8e48c7e6e58b7019a04cc71bbfec2c... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
metacpan.org/release/TONYC/Imager-1.035/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
www.openwall.com/lists/oss-security/2026/09/17/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
github.com/tonycoz/imager/commit/48ba8ac0749f89466b6e6681fb88cbdb51086eb... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
github.com/tonycoz/imager/issues/568 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-08-19T00:00:00.000ZVersion 1.035 released with fix.

Solutions

CNA: Upgrade to Imager 1.035 or later.

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