Out-of-bounds read in Linux kernel - CVE-2026-98123
Published: September 28, 2026
Vulnerability identifier: #VU152326
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98123
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to read memory out of bounds.
The vulnerability exists due to an out-of-bounds read in sctp_get_asconf_response() when processing a truncated SCTP_PARAM_ERR_CAUSE parameter in an ASCONF-ACK. A remote user can send a crafted ASCONF-ACK containing an error-cause parameter without a complete error header to read memory out of bounds.
The association must have ADD-IP enabled and an outstanding ASCONF request.
Affected software
Linux kernel
How to mitigate CVE-2026-98123
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3