SUSE CVE-2026-64004

In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix locking in .getsockopt Mirror iucvsocksetsockopt and wrap the whole switch in locksock/releasesock. The pre-existing SOMSGLIMIT-only lock becomes redundant and is removed. Any AFIUCV HIPER user can potentially crash...

Linux Distros Unpatched Vulnerability : CVE-2026-64004

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 iucvsocksetsockopt and wrap the whole switch in locksock/releasesock. The pre-existing SOMSGLIMIT-only lock becomes...

CVE-2026-64004

In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix locking in .getsockopt Mirror iucvsocksetsockopt and wrap the whole switch in locksock/releasesock. The pre-existing SOMSGLIMIT-only lock becomes redundant and is removed. Any AFIUCV HIPER user can potentially crash...

CVE-2026-64004 net/iucv: fix locking in .getsockopt

In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix locking in .getsockopt Mirror iucvsocksetsockopt and wrap the whole switch in locksock/releasesock. The pre-existing SOMSGLIMIT-only lock becomes redundant and is removed. Any AFIUCV HIPER user can potentially crash...

CVE-2026-64004

CVE-2026-64004 concerns the Linux kernel net/iucv subsystem. The vulnerability arises from a race between recvmsg() and getsockopt(SO_MSGSIZE) where the SO_MSGSIZE path dereferences iucv->hs_dev->mtu after iucv_sock_close() has set hs_dev to NULL, causing a NULL pointer dereference oops. Mi...

EUVD-2026-45577

In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix locking in .getsockopt Mirror iucvsocksetsockopt and wrap the whole switch in locksock/releasesock. The pre-existing SOMSGLIMIT-only lock becomes redundant and is removed. Any AFIUCV HIPER user can potentially crash...

PT-2026-61321

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists in the net/iucv component when recvmsg is called simultaneously with getsockoptSO MSGSIZE. An AF IUCV HIPER user can trigger a NULL pointer dereference because th...

K000162266: Linux kernel hvc_iucv driver vulnerability CVE-2026-53306

Security Advisory Description In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES;...

SUSE CVE-2026-53306

In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES; Sometimes hvciucvtable is limite...

Linux Distros Unpatched Vulnerability : CVE-2026-53306

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct...

DEBIAN-CVE-2026-53306

In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES; Sometimes hvciucvtable is limite...

CVE-2026-53306

In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES; Sometimes hvciucvtable is limite...

CVE-2026-53306

In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES; Sometimes hvciucvtable is limite...

CVE-2026-53306 tty: hvc_iucv: fix off-by-one in number of supported devices

In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES; Sometimes hvciucvtable is limite...

CVE-2026-53306

In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES; Sometimes hvciucvtable is limite...

CVE-2026-53306

CVE-2026-53306 affects the Linux kernel tty/hvc_iucv path. The issue is an off-by-one in the number of supported devices: MAX_HVC_IUCV_LINES is 8, and hvc_iucv_devices can be 0–8. When devices == 8, a path that validates against the table size can access hvc_iucv_table[8], potentially triggering ...

CVE-2026-53306 tty: hvc_iucv: fix off-by-one in number of supported devices

In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES; Sometimes hvciucvtable is limite...

EUVD-2026-39841

In the Linux kernel, the following vulnerability has been resolved: tty: hvciucv: fix off-by-one in number of supported devices MAXHVCIUCVLINES == HVCALLOCTTYADAPTERS == 8. This is the number of entries in: static struct hvciucvprivate hvciucvtableMAXHVCIUCVLINES; Sometimes hvciucvtable is limite...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/iucv: Fix size of interrupt data iucvirqdata needs to be 4 bytes larger. These bytes are not used by the iucv module, but written by the z/VM hypervisor in case a CPU is deconfigured. Reported as: BUG dma-kmalloc-64 Not...

Unity Linux 20.1050e Security Update: kernel (UTSA-2026-005115)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005115 advisory. In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix use after free in iucvsockclose iucvseverpath is called from process context and fr...