CVE-2026-89495 ocfs2: bound namelen in dlm_migrate_request_handler

In the Linux kernel, the following vulnerability has been resolved: ocfs2: bound namelen in dlmmigraterequesthandler Patch series "ocfs2/dlm: bound peer-controlled lengths in the o2dlm". The o2dlm receive handlers trust u8 length and count fields from the wire without bounding them, so a node in ...

CVE-2026-89495

In the Linux kernel, the following vulnerability has been resolved: ocfs2: bound namelen in dlmmigraterequesthandler Patch series "ocfs2/dlm: bound peer-controlled lengths in the o2dlm". The o2dlm receive handlers trust u8 length and count fields from the wire without bounding them, so a node in ...

CVE-2026-89495

CVE-2026-89495 affects the OCFS2/DLM (o2dlm) subsystem in the Linux kernel . The migration and recovery message handlers trust peer-supplied u8 length fields (namelen, lockname_len, num_locks) without bounding them before passing them to memcpy, resulting in a heap out-of-bounds write of up to ~2...

CVE-2026-89494

In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate lengths in dlmmiglockreshandler A node receiving a DLMMIGLOCKRES message trusts several fields of the peer-supplied dlmmigratablelockres without validation. numlocks and locknamelen are bounded only on the sending...

CVE-2026-89494 ocfs2: validate lengths in dlm_mig_lockres_handler

In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate lengths in dlmmiglockreshandler A node receiving a DLMMIGLOCKRES message trusts several fields of the peer-supplied dlmmigratablelockres without validation. numlocks and locknamelen are bounded only on the sending...

EUVD-2026-76400

In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate lengths in dlmmiglockreshandler A node receiving a DLMMIGLOCKRES message trusts several fields of the peer-supplied dlmmigratablelockres without validation. numlocks and locknamelen are bounded only on the sending...

CVE-2026-89494 ocfs2: validate lengths in dlm_mig_lockres_handler

In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate lengths in dlmmiglockreshandler A node receiving a DLMMIGLOCKRES message trusts several fields of the peer-supplied dlmmigratablelockres without validation. numlocks and locknamelen are bounded only on the sending...

CVE-2026-89494

CVE-2026-89494 is a CRITICAL (CVSS 9.8) vulnerability in the OCFS2 Distributed Lock Manager (DLM) within the Linux kernel. The dlm_mig_lockres_handler trusts peer-supplied num_locks and lockname_len fields without validation, leading to an out-of-bounds read (triggering a BUG_ON panic) and a heap...

PT-2026-90210

Name of the Vulnerable Software and Affected Versions Linux Kernel affected versions not specified Description In the ocfs2 module, a node receiving a DLM MIG LOCKRES message trusts several fields of the peer-supplied dlm migratable lockres without validation. Specifically, the num locks and...

PT-2026-90211

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description In the Linux kernel, the o2dlm receive handlers trust length and count fields from the wire without proper bounding. This allows a malicious or compromised node that has joined the DLM...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-107280)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-107280 advisory. In the Linux kernel, the following vulnerability has been resolved: dlm: fix possible lkbresource null dereference This patch fixes a possible null pointer dereferen...

SUSE CVE-2026-74348

In the Linux kernel, the following vulnerability has been resolved: ocfs2/dlm: require a ref for lockingstate debugfs open debuglockresopen copies inode-iprivate into struct debuglockres and debuglockresrelease later drops that pointer with dlmput. That only works if open successfully pins the...

SUSE CVE-2026-74401

In the Linux kernel, the following vulnerability has been resolved: dlm: fix add msg handle in sendqueue ordered In a benchmark scenario triggering a lot of requests that triggers a lot of DLM messages on the network it can be that the mh-seq is not ordered according the oldest seq number. This...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098826)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098826 advisory. In the Linux kernel, the following vulnerability has been resolved: dlm: fix possible lkbresource null dereference This patch fixes a possible null pointer dereferen...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098985)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098985 advisory. In the Linux kernel, the following vulnerability has been resolved: dlm: validate length in dlmsearchrsbtree The len parameter in dlmdumprsbname is not validated and...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabilit...

kernel: dlm: validate length in dlm_search_rsb_tree

A flaw was found in the Linux kernel's Distributed Lock Manager dlm module. An attacker could send specially crafted network messages with an oversized length parameter to the dlmdumprsbname function. This lack of validation can lead to an out-of-bounds write in the dlmsearchrsbtree function,...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: dlm: fixed the addition of a message handling mechanism in sendqueue. In a benchmark scenario where many requests are triggered, which results in a large number of DLM messages being sent across the network, it is possible that...

RHEL 8 : kernel (RHSA-2026:59091)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:59091 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: KVM: x86: Don't recheck L1...

The vulnerability of the dlm_search_rsb_tree() function in the fs/dlm/lock.c module of the Dlm subsystem in the Linux operating system allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the dlmsearchrsbtree function in the fs/dlm/lock.c module of the Dlm subsystem of the Linux operating system is related to the copying of buffers without checking the size of the input data a classic buffer overflow attack. Exploiting this vulnerability could allow an attacke...