What’s Vulnerable › Vulnerabilities

CVE-2025-6199: Gdk-pixbuf: uninitialized memory disclosure in gdkpixbuf gif lzw decoder

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-17 · updated 2026-06-30
• Weakness: CWE-200

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.

Affected products

• GNOME Gdkpixbuf: 2.0.0

References

• https://access.redhat.com/security/cve/CVE-2025-6199
• https://bugzilla.redhat.com/show_bug.cgi?id=2373147
• https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/257
• https://lists.debian.org/debian-lts-announce/2025/06/msg00023.html

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