What’s Vulnerable › Vulnerabilities

CVE-2017-20286: DevIL through 1.8.0 Heap Buffer Overflow via GIF iGetPalette

• Severity: high (CVSS 7.8 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: 2026-10-14 · updated 2026-10-16
• Weakness: CWE-787

Description

DevIL through 1.8.0 contains a heap-based buffer overflow in iGetPalette() in il_gif.cpp that allows attackers to write beyond a 768-byte palette buffer when loading GIF images. Attackers can supply a crafted two-frame GIF whose second frame uses disposal method 1 with a local colour table, writing up to 384 controlled bytes past the heap allocation and possibly executing code.

Affected products

• DentonW DevIL: through 1.8.0

References

• https://github.com/DentonW/DevIL/blob/a2d9193fed0c7f93519c0c4c28b3348e0cb5759b/DevIL/src-IL/src/il_gif.cpp#L189-L226
• https://github.com/DentonW/DevIL/blob/a2d9193fed0c7f93519c0c4c28b3348e0cb5759b/DevIL/src-IL/src/il_gif.cpp#L314-L324
• https://github.com/DentonW/DevIL/issues/67
• https://hackmd.io/@haind-pwn/devil-gif-palette-reuse-heap-overflow
• https://www.vulncheck.com/advisories/devil-through-1.8.0-heap-buffer-overflow-via-gif-igetpalette

Get alerted when CVE-2017-20286 or the next vulnerability affects your stack