Low [CVE-2025-6199] Gdk-pixbuf: uninitialized memory disclosure in gdkpixbuf gif lzw decoder
This low-severity Red Hat Linux advisory covers CVE-2025-6199 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published
Summary
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. The Red Hat Product Security team has assessed the severity of this vulnerability as Low, as it requires user interaction and local access to exploit.
The flaw allows limited information disclosure by including uninitialized memory in image buffers processed by GdkPixbuf. This occurs due to improper output length handling when decoding malformed GIFs using LZW compression.
While exploitable with crafted inputs, the impact is minor and does not affect system integrity or availability. Weakness: CWE-200.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Will not fix / out of support: Red Hat Enterprise Linux 6.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: gdk-pixbuf2; Red Hat package: glycin-loaders; Red Hat package: loupe; Red Hat package: snapshot; and 1 more.
Is CVE-2025-6199 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2025-6199 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2025-6199?
The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.
Confirm against the vendor advisory before you patch.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Mitigation checklist
- 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.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
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