Imager versions before 1.036 for Perl disclose uninitialised heap memory reading a paletted image with pixel indexes past its colour map in i_gpix_p and i_glin_p

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93018
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 14:19:04 UTC
Updated2026-09-22 19:16:57 UTC
DescriptionImager versions before 1.036 for Perl disclose uninitialised heap memory reading a paletted image with pixel indexes past its colour map in i_gpix_p and i_glin_p. The palette is allocated uninitialised, and only the entries a reader adds count as populated. The TGA reader stores pixel indexes without checking them against the colour map. i_gpix_p() rejects only an index greater than the count, so an index equal to it reads the first unpopulated entry, and getpixel() returns it. i_glin_p() skips any index at or beyond the count without writing that pixel to the caller's buffer. The palette-to-RGB conversion reads each row through an uninitialised buffer, so those pixels of the converted image hold prior heap contents. Reading an attacker-supplied image through Imager->read() and then fetching its pixels or converting it to RGB discloses process heap memory.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from ADP

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

EPSS: 0.001430000 probability, percentile 0.039970000 (date 2026-09-23)

Problem Types: CWE-193 | CWE-908 | CWE-908 CWE-908 Use of Uninitialized Resource | CWE-193 CWE-193 Off-by-one Error

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

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

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

References

ReferenceSourceLinkTags
github.com/tonycoz/imager/security/advisories/GHSA-j7v7-cm4g-vrgf 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
metacpan.org/release/TONYC/Imager-1.036/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
github.com/tonycoz/imager/commit/dcf0a52e2732399d42ab44d98af6934658d068e... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
www.openwall.com/lists/oss-security/2026/09/18/8 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: router0mail (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-18T00:00:00.000ZVersion 1.036 released with fix.

Solutions

CNA: Upgrade to Imager 1.036 or later.

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