Gdk-pixbuf: uninitialized memory disclosure in gdkpixbuf gif lzw decoder

Summary

CVE	CVE-2025-6199
State	PUBLISHED
Assigner	redhat
Source Priority	CVE Program / NVD first with legacy fallback
Published	2025-06-17 15:15:54 UTC
Updated	2026-06-30 11:16:28 UTC
Description	A flaw was found in the GIF parser of GdkPixbuf’s LZW decoder. When an invalid symbol is encountered during decompression, the decoder sets the reported output size to the full buffer length rather than the actual number of written bytes. This logic error results in uninitialized sections of the buffer being included in the output, potentially leaking arbitrary memory contents in the processed image.

Risk And Classification

Primary CVSS: v3.1 3.3 LOW from [email protected]

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

EPSS: 0.001480000 probability, percentile 0.044150000 (date 2026-07-03)

Problem Types: CWE-200 | NVD-CWE-noinfo | CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	3.3	LOW	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N`
3.1	[email protected]	Secondary	3.3	LOW	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N`
3.1	CNA	CVSS	3.3	LOW	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N`

CVSS v3.1 Breakdown

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

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

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Gnome	Gdkpixbuf	2.0.0	-	All	All
Operating System	Redhat	Enterprise Linux	10.0	All	All	All
Operating System	Redhat	Enterprise Linux	6.0	All	All	All
Operating System	Redhat	Enterprise Linux	7.0	All	All	All
Operating System	Redhat	Enterprise Linux	8.0	All	All	All
Operating System	Redhat	Enterprise Linux	9.0	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Red Hat	Red Hat Enterprise Linux 10	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 10	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 10	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 10	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 6	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 7	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9	Not specified	Not specified

References

Reference	Source	Link	Tags
lists.debian.org/debian-lts-announce/2025/06/msg00023.html	af854a3a-2127-422b-91ae-364da2661108	lists.debian.org
bugzilla.redhat.com/show_bug.cgi	[email protected]	bugzilla.redhat.com	Issue Tracking, Third Party Advisory
gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/257	[email protected]	gitlab.gnome.org
access.redhat.com/security/cve/CVE-2025-6199	[email protected]	access.redhat.com	Third Party Advisory
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

Additional Advisory Data

Source	Time	Event
CNA	2025-06-17T11:53:43.788Z	Reported to Red Hat.
CNA	2025-06-17T00:00:00.000Z	Made public.

Workarounds

CNA: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

There are currently no legacy QID mappings associated with this CVE.