Control: retitle -1 gdk-pixbuf: CVE-2026-16768: out-of-bounds read when loading
malicious .ico palette
Control: forwarded -1
https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/279
On Fri, 31 Jul 2026 at 07:19:27 +0200, Salvatore Bonaccorso wrote:
| When parsing a specially crafted ICO
| file with pixel values that exceed the defined palette range, an
| out-of-bounds read can occur due to improper bounds checking against
| the actual palette size.
In testing/unstable, I believe this only affects -ports architectures:
gdk-pixbuf >= 2.44.5+dfsg-3 loads most image formats using glycin rather than
its own C code. (Exceptions: .xpm, .xbm still use C code because the
equivalent Rust code in glycin was not feature-complete until recently.)
-ports architectures still use the C code and are still vulnerable
(glycin FTBFS on ppc64, and its build-deps are unavailable on the other
-ports architectures).
trixie still uses the C code and so is still vulnerable. A fix was
proposed upstream in
<https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/merge_requests/279> but has
not yet been reviewed/merged.
smcv
