Memory leak in Linux kernel - CVE-2026-98354
Published: October 7, 2026
Vulnerability identifier: #VU153677
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98354
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 denial of service through memory exhaustion.
The vulnerability exists due to a receive buffer memory leak in ib_mad_complete_recv() in the RDMA MAD subsystem when processing management datagrams that fail PKey enforcement. A remote attacker can repeatedly send management datagrams with an incorrect PKey to cause a denial of service through memory exhaustion.
Each rejected datagram leaks approximately 300 bytes for an InfiniBand port or approximately 2 KB for OPA.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98354
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/3476c28c9addfa253f505e6bd87f1f5598b961d0
- https://git.kernel.org/stable/c/39c4ea72a40503e102ae07e6776005f96ca078a6
- https://git.kernel.org/stable/c/4617c9a856188674dddb0ca66979746d07688579
- https://git.kernel.org/stable/c/5091e25ec503f7fc02723ca435226467b68caac7
- https://git.kernel.org/stable/c/752b30e9d339008e5ce7eed412e9446078916129
- https://git.kernel.org/stable/c/8e2036fb47a5b152d53eadbd35abf311bd34cc7f
- https://git.kernel.org/stable/c/bad289e42f512646a988f278f536d21547df73f1
- https://git.kernel.org/stable/c/c0d8df85db146d6275e226cb950023be69dd6c77