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

  - afs: Fix UAF when sending a message In afs_make_call(), there's a race with async call reception and     destruction. If a call is dispatched that doesn't have call->write_iter set (used to specify the data     content for FS.StoreData), then the first rxrpc_kernel_send_data() will not set MSG_MORE in the msghdr.
    Once rxrpc_send_data() queues the last request packet, the response could come in at any time and cause     the call to be completed and put. However, afs_make_call() will look at the call again to see it
    ->write_iter should be handled - something it's only allowed to do if it has its own ref on the call.
    Whilst this is the case for synchronous calls, it isn't true for async calls such as FS.FetchData. There's     also a potential UAF in afs_make_call() in the event that an asynchronous call is being sent, but the call     fails in some way (e.g. it gets aborted from the server). The problem there is that afs_make_call() tries     to abort a call if the rxrpc send fails, but the asynchronous notification from rxrpc may have caused the     afs_call to be torn down. generic/650 plays games with randomly taking CPUs offline, and can interject a     significant delay such that the call is deallocated before afs_make_call() gets to check call->write_iter
    - and a UAF ensues (caught by KASAN). BUG: KASAN: slab-use-after-free in afs_make_call+0x1c90/0x2210     [kafs] Read of size 8 at addr ffff888035e050e8 by task fsstress/1409 Fix this by making afs_make_op_call()     give the op->call its own ref rather than transferring the caller's ref to it and then dropping the ref     when afs_make_call() returns. This also means that the afs_make_call() func never loses its ref on the     call now. (CVE-2026-74506)

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

ID	Name	Product	Family	Published	Updated	Severity
376443	Ubuntu 24.04 LTS / 26.04 LTS : Linux kernel vulnerabilities (USN-8959-1)	Nessus	Ubuntu Local Security Checks	11/5/2026	11/5/2026	high
335757	Linux Distros Unpatched Vulnerability : CVE-2026-74506	Nessus	Misc.	8/15/2026	11/7/2026	high

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