In the Linux kernel, the following vulnerability has been resolved: SUNRPC: always drain cache_cleaner before destroying a cache_detail sunrpc_destroy_cache_detail() only cancels the global cache_cleaner delayed_work when cache_list is empty. During per-netns teardown cache_list is never empty because init_net's caches remain registered, so the cancel never fires. After unlink, the caller proceeds to cache_destroy_net() which kfrees the cache_detail while cache_clean() may still hold a dangling pointer to it. The result is a use-after-free: cache_dequeue() takes cd->queue_lock on freed memory, and cache_put() dereferences cd->cache_put as a function pointer from freed slab. Drop the list_empty guard so that cancel_delayed_work_sync() always runs, ensuring any in-flight cache_clean() completes before the cache_detail is freed. Re-arm the cleaner afterwards if other caches are still registered.

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

  - SUNRPC: always drain cache_cleaner before destroying a cache_detail sunrpc_destroy_cache_detail() only     cancels the global cache_cleaner delayed_work when cache_list is empty. During per-netns teardown     cache_list is never empty because init_net's caches remain registered, so the cancel never fires. After     unlink, the caller proceeds to cache_destroy_net() which kfrees the cache_detail while cache_clean() may     still hold a dangling pointer to it. The result is a use-after-free: cache_dequeue() takes cd->queue_lock     on freed memory, and cache_put() dereferences cd->cache_put as a function pointer from freed slab. Drop     the list_empty guard so that cancel_delayed_work_sync() always runs, ensuring any in-flight cache_clean()     completes before the cache_detail is freed. Re-arm the cleaner afterwards if other caches are still     registered. (CVE-2026-89548)

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

ID	Name	Product	Family	Type	Severity
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
345253	Linux Distros Unpatched Vulnerability : CVE-2026-89548	Nessus	Misc.	Local	high

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CVE-2026-89548

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