Heap-based Buffer Overflow Affecting socat package, versions [0,]
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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- published28 Jun 2026
- disclosed25 Jun 2026
- creditTristan Madani
Introduced: 25 Jun 2026
CVE-2026-56123 (opens in a new tab)How to fix?
There is no fixed version for socat.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the SOCKS5 reply parsing process. An attacker can overwrite adjacent heap memory with arbitrary data by sending a maliciously crafted SOCKS5 reply containing a negative domain name length value, which is improperly handled and leads to an unbounded heap write.