An update of the linux package has been released.

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

  - net/iucv: fix locking in .getsockopt Mirror iucv_sock_setsockopt() and wrap the whole switch in     lock_sock()/release_sock(). The pre-existing SO_MSGLIMIT-only lock becomes redundant and is removed. Any     AF_IUCV HIPER user can potentially crash the kernel by racing recvmsg() with getsockopt(SO_MSGSIZE): the     SO_MSGSIZE arm dereferences iucv->hs_dev->mtu after iucv_sock_close() (called from the racing recvmsg())     has set hs_dev to NULL, producing a NULL pointer dereference oops. (CVE-2026-64004)

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

ID	Name	Product	Family	Published	Updated	Severity
329326	Photon OS 5.0: Linux PHSA-2026-5.0-0926	Nessus	PhotonOS Local Security Checks	7/24/2026	7/28/2026	high
328154	Linux Distros Unpatched Vulnerability : CVE-2026-64004	Nessus	Misc.	7/20/2026	7/29/2026	high
322944	Photon OS 5.0: Linux PHSA-2026-5.0-0895	Nessus	PhotonOS Local Security Checks	6/26/2026	8/1/2026	high

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