Vulnerability · Published Oct 29, 2026 · Assigned by rt-labs

CVE-2026-111730Out-of-bounds write in CheckPeers block parser due to unvalidated peer station name length

High 7.2

In plain English

A high-severity out-of-bounds write in P-Net from RT-Labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 4.0)7.2High

Exploit odds (30 days)0.2%top 91.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

P-Net before 1.0.3 does not validate the LengthPeerStationName field of a CheckPeers block in get_check_peer(). The received length (up to 255) was used to copy data into the 241-byte peer station name buffer and to place the terminating NUL byte, so a crafted block writes up to 15 bytes past the end of the buffer. This can lead to a crash (denial of service) or potentially arbitrary code execution. Requires establishment of session that needs ADJACENT network access.

Affected products (as reported)

Vendor	Product	Versions
RT-Labs	P-Net	0 – before 1.0.3

Weakness: CWE-787 · Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

References

Cybersecurity advisory for P-Net