Integer Underflow (Wrap or Wraparound) Affecting sbabic/swupdate package, versions [,2026.05)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published3 May 2026
- disclosed24 Apr 2026
- creditKazuma Matsumoto
Introduced: 24 Apr 2026
CVE-2026-28525 (opens in a new tab)How to fix?
Upgrade sbabic/swupdate to version 2026.05 or higher.
Overview
Affected versions of this package are vulnerable to Integer Underflow (Wrap or Wraparound) via the mg_http_multipart_continue_wait_for_chunk function. An attacker can cause a denial of service by sending a crafted HTTP POST request with a malformed multipart boundary and controlled TCP stream timing, resulting in an out-of-bounds heap read that writes data beyond the allocated receive buffer to a local IPC socket.