SCTP Transport Count Overflow in Linux Kernel Products
CVE-2026-74469

8.8HIGH

Key Information:

Vendor

Linux
Status
Linux
Vendor
CVE Published:
15 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-74469?

A vulnerability exists in the Linux kernel related to SCTP (Stream Control Transmission Protocol) which allows for a transport count overflow. The function sctp_assoc_add_peer() increments a 16-bit transport_count for each unique peer. When the transport_count exceeds 65,536, it wraps around to zero, leading to potential memory corruption and the possibility of reserving excessive payload sizes. To mitigate this, the system should reject new unique peers once the limit of U16_MAX has been reached, ensuring proper diagnostic data handling and memory protection.

Affected Version(s)

Linux 8f840e47f190cbe61a96945c13e9551048d42cef

Linux 8f840e47f190cbe61a96945c13e9551048d42cef

Linux 8f840e47f190cbe61a96945c13e9551048d42cef < 80f48523a0fe42db2e7375dff4e38a25c117090a

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-74469
Created by HORKimhab

References

https://git.kernel.org/stable/c/b453e00da1211e997b82743d2...
https://git.kernel.org/stable/c/dfea32dd76f390e3155177b00...
https://git.kernel.org/stable/c/80f48523a0fe42db2e7375dff...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.