Arbitrary code execution via heap buffer overflow during SSH negotiation
Summary
Arbitrary code execution via heap buffer overflow during SSH negotiation. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-120. Red Hat lists fixing advisory RHSA-2026:46955 with package libssh2-main-1.11.1-10.3.hum1.
What this means
In plain English
Arbitrary code execution via heap buffer overflow during SSH negotiation. Red Hat rates this moderate (CVSS 5.3). Weakness: CWE-120. Red Hat lists fixing advisory RHSA-2026:46955 with package libssh2-main-1.11.1-10.3.hum1. Successful exploitation can let an attacker run code in the security context of the affected service or device.
Recommended action
Primary action: update to a vendor-listed fixed release: libssh2-main-1.11.1-10.3.hum1, RHSA-2026:46955.
Rewritten locally from the scraped official advisory data above; no generative API is used. The vendor advisory is authoritative.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- libssh2-main-1.11.1-10.3.hum1
- RHSA-2026:46955
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: libssh2-main-1.11.1-10.3.hum1, RHSA-2026:46955. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Discussion(0)
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