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.
Problem types
Exposure of Sensitive Information to an Unauthorized Actor
Product status
Any version before 2.43.2
Timeline
| 2025-06-17: | Reported to Red Hat. |
| 2025-06-17: | Made public. |
References
lists.debian.org/debian-lts-announce/2025/06/msg00023.html
access.redhat.com/security/cve/CVE-2025-6199
bugzilla.redhat.com/show_bug.cgi?id=2373147 (RHBZ#2373147)