Memory leak in Linux kernel - CVE-2026-90108

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Main Vulnerability Database Vulnerabilities #VU151379

Memory leak in Linux kernel - CVE-2026-90108

Published: September 19, 2026


Vulnerability identifier: #VU151379
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90108
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a memory leak.

The vulnerability exists due to improper memory management in smc_llc_event_handler() when handling an ADD_LINK request after a CONFIRM_LINK or ADD_LINK_CONT message has been stashed during the SMC_LLC_FLOW_REQ_ADD_LINK state. A remote attacker can send a sequence of LLC messages to cause a memory leak.

The overwritten stashed entry is a kmalloc allocation with no consumer in this flow state.


Affected software

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

How to mitigate CVE-2026-90108

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

External References

Related Security Bulletins