In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate lengths in dlm_mig_lockres_handler A node receiving a DLM_MIG_LOCKRES message trusts several fields of the peer-supplied dlm_migratable_lockres without validation. num_locks and lockname_len are bounded only on the sending side, and the message is never checked to actually carry num_locks migratable_lock entries. As a result dlm_process_recovery_data() walks mres->ml[0..num_locks) past the kmalloc(data_len) copy of the message (an out-of-bounds read that ends in a BUG_ON panic), and dlm_init_lockres() copies lockname_len bytes into the fixed 32-byte o2dlm_lockname slab object (a heap out-of-bounds write). Both are reachable by any node in the domain. Validate these fields right after dlm_grab(), before anything uses them -- including the not-joined error path, which already prints mres->lockname with the unbounded lockname_len as a %.*s precision. Reject the message unless lockname_len <= DLM_LOCKID_NAME_MAX, num_locks <= DLM_MAX_MIGRATABLE_LOCKS (the bound the sender already asserts), and the payload is large enough to hold the claimed locks. Conforming recovery and migration messages are unaffected.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-142682 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    ocfs2: validate lengths in dlm_mig_lockres_handler

    A node receiving a DLM_MIG_LOCKRES message trusts several fields of the     peer-supplied dlm_migratable_lockres without validation.  num_locks and     lockname_len are bounded only on the sending side, and the message is     never checked to actually carry num_locks migratable_lock entries.  As a     result dlm_process_recovery_data() walks mres->ml[0..num_locks) past the     kmalloc(data_len) copy of the message (an out-of-bounds read that ends in     a BUG_ON panic), and dlm_init_lockres() copies lockname_len bytes into the     fixed 32-byte o2dlm_lockname slab object (a heap out-of-bounds write).
    Both are reachable by any node in the domain.

    Validate these fields right after dlm_grab(), before anything uses them --     including the not-joined error path, which already prints mres->lockname     with the unbounded lockname_len as a %.*s precision.  Reject the message     unless lockname_len <= DLM_LOCKID_NAME_MAX, num_locks <=     DLM_MAX_MIGRATABLE_LOCKS (the bound the sender already asserts), and the     payload is large enough to hold the claimed locks.  Conforming recovery     and migration messages are unaffected.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-143037 advisory.

    In the Linux kernel, the following vulnerability has been resolved:

    ocfs2: validate lengths in dlm_mig_lockres_handler

    A node receiving a DLM_MIG_LOCKRES message trusts several fields of the     peer-supplied dlm_migratable_lockres without validation.  num_locks and     lockname_len are bounded only on the sending side, and the message is     never checked to actually carry num_locks migratable_lock entries.  As a     result dlm_process_recovery_data() walks mres->ml[0..num_locks) past the     kmalloc(data_len) copy of the message (an out-of-bounds read that ends in     a BUG_ON panic), and dlm_init_lockres() copies lockname_len bytes into the     fixed 32-byte o2dlm_lockname slab object (a heap out-of-bounds write).
    Both are reachable by any node in the domain.

    Validate these fields right after dlm_grab(), before anything uses them --     including the not-joined error path, which already prints mres->lockname     with the unbounded lockname_len as a %.*s precision.  Reject the message     unless lockname_len <= DLM_LOCKID_NAME_MAX, num_locks <=     DLM_MAX_MIGRATABLE_LOCKS (the bound the sender already asserts), and the     payload is large enough to hold the claimed locks.  Conforming recovery     and migration messages are unaffected.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - ocfs2: validate lengths in dlm_mig_lockres_handler A node receiving a DLM_MIG_LOCKRES message trusts     several fields of the peer-supplied dlm_migratable_lockres without validation. num_locks and lockname_len     are bounded only on the sending side, and the message is never checked to actually carry num_locks     migratable_lock entries. As a result dlm_process_recovery_data() walks mres->ml[0..num_locks) past the     kmalloc(data_len) copy of the message (an out-of-bounds read that ends in a BUG_ON panic), and     dlm_init_lockres() copies lockname_len bytes into the fixed 32-byte o2dlm_lockname slab object (a heap     out-of-bounds write). Both are reachable by any node in the domain. Validate these fields right after     dlm_grab(), before anything uses them -- including the not-joined error path, which already prints     mres->lockname with the unbounded lockname_len as a %.*s precision. Reject the message unless lockname_len     <= DLM_LOCKID_NAME_MAX, num_locks <= DLM_MAX_MIGRATABLE_LOCKS (the bound the sender already asserts), and     the payload is large enough to hold the claimed locks. Conforming recovery and migration messages are     unaffected. (CVE-2026-89494)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
370791	Unity Linux 20.1070e Security Update: kernel (UTSA-2026-142682)	Nessus	Unity Linux Local Security Checks	Local	critical
370746	Unity Linux 20.1070a Security Update: kernel (UTSA-2026-143037)	Nessus	Unity Linux Local Security Checks	Local	critical
366919	Debian dla-4841 : ata-modules-6.1.0-53-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
364137	Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2026-500374)	Nessus	Oracle Linux Local Security Checks	Local	high
362907	Debian dla-4817 : ata-modules-6.12.107+deb12-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
351155	Debian dsa-6528 : ata-modules-6.12.111+deb13-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
345319	Linux Distros Unpatched Vulnerability : CVE-2026-89494	Nessus	Misc.	Local	critical

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