Add jxl-grid advisory

[Shnatsel]

Affected crate(s)

• jxl-grid (771,090 recent downloads)

Links to upstream issue(s) or PR(s)

GHSA-5pmv-rx8r-wmv5

I have authored the GHSA advisory text so I can contribute it under CC-0.

Severity

Medium (high on 32-bit platforms, benign otherwise). Write buffer overflow on attacker-controlled input.

Checklist

• Advisory filename(s) starts with RUSTSEC-0000-0000 as the ID
• date field is set to the public disclosure date
• Contains a concise and descriptive title after advisory metadata
• Asked maintainer(s) if publishing an advisory is appropriate

[djc]

Thanks!