Infinite loop in Linux kernel - CVE-2026-99128
Published: October 29, 2026
Vulnerability identifier: #VU158465
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-99128
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by locking up the kernel's receive softirq.
The vulnerability exists due to insufficient chunk-length validation in the SCTP inqueue parser, sctp_inq_pop(), when processing incoming SCTP chunks. A remote attacker can send a zero-length ASCONF chunk over an established association whose SCTP-AUTH policy covers ASCONF to cause repeated processing of the same malformed chunk and lock up the receive softirq.
Exploitation requires net.sctp.addip_enable=1 and net.sctp.auth_enable=1.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-99128
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2