Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: s390/diag: fixed the issue ofracy access to the physical CPU number in the diag 9c handler. We currently check if the target CPU equals -1, but this may change at a later time when we will use this functionality. We store th...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: s390/sclp: Fixed the check for NULL values in the SCCB field. The tracing code called by the SCLP interrupt handler contains early exits if the SCCB address associated with an interrupt is NULL. This check is performed after the...

USN-8816-3: Linux kernel (Oracle) vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - S390 architecture; - x86 architecture; - DRBD Distributed Replicated Block Device drivers; -...

CVE-2026-97980

A flaw was found in the Linux kernel's s390 architecture debug component. A missing validation check in the debug level configuration interface allows an uninitialized or invalid debug handle to be dereferenced. A local user could exploit this flaw to crash the system, resulting in a Denial of...

USN-8816-2: Linux kernel vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - S390 architecture; - x86 architecture; - DRBD Distributed Replicated Block Device drivers; -...

USN-8816-1 linux, linux-aws, linux-aws-7.0, linux-hwe-7.0, linux-ibm, linux-oracle, linux-raspi, linux-realtime vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - S390 architecture; - x86 architecture; - DRBD Distributed Replicated Block Device drivers; -...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf, s390: Fixed a potential memory leak related to jitdata. Make sure that jitdata is freed through kfree in the error path...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: s390/dcssblk: fixed the kernel crash caused by corruption in the listadd operation. The commit fb08a1908cb1 “dax: simplified the daxdevice gendisk association” introduced new logic for gendisk association, requiring drivers to...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: s390/ptrace: The handling of setting the fpc register was corrected. If the value of the floating-point control fpc register of a traced process is modified using the ptrace interface, the new value is tested for validity by...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: s390: fixed the issue where double-free of GS and RI CBs occurs during fork failures. The pointers for guarded storage and runtime instrumentation control blocks are stored in the threadstruct of the associated task. These...

Astra Linux – Vulnerability in Linux 5.10

A vulnerability was discovered in the kvms390guestsidaop function within the arch/s390/kvm/kvm-s390.c file in KVM for s390 in the Linux kernel. This flaw allows a local attacker with normal user privileges to gain unauthorized memory write access. This vulnerability affects Linux kernel versions...

PT-2026-86182

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM s390 PCI implementation regarding the validation of the All-Interrupt Bit Vector AIBV and the All-Interrupt Summary Bit AISB before pinning guest pages. The AI...

kernel: s390/cpum_sf: Handle CPU hotplug remove during sampling

A vulnerability was found in the Linux Kernel. This issue affects performance monitoring on the s390 architecture during specific CPU hotplug scenarios...

CVE-2026-80684

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix NULL dereference on AIBV allocation failure The airqivcreate can return NULL on failure, but the return value was never checked. If it fails, zdev-aibv will be NULL and fail when dereferenced in kvmzpcisetairq...

EUVD-2026-66466

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Ensure first IDAW remains constant The first IDAW in a list does not need to be on a 2K/4K boundary like all others, and so is read separately to accurately calculate the size of the buffer needed to read the full...

SUSE CVE-2026-80551

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Ensure first IDAW remains constant The first IDAW in a list does not need to be on a 2K/4K boundary like all others, and so is read separately to accurately calculate the size of the buffer needed to read the full...

UBUNTU-CVE-2026-80548

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Selectively expand iomutex The iomutex was defined to serialize the ioregions, but then has also sort of been associated with the I/O themselves because of the close relationship they share. With the handful of race...

CVE-2026-80584

In the Linux kernel, the following vulnerability has been resolved: s390/qeth: validate user buffer length in SNMP and ARP query ioctls qethsnmpcommand and qethl3arpquery allocate a buffer sized by a user-supplied length udatalen without checking a lower bound, then set udataoffset to a fixed...

CVE-2026-80555

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Free all memory if cpinit fails The routine cpfree is called to unpin/free any memory once an I/O is completed successfully, or if cpprefetch fails. But if cpinit fails, and cp-initialized is not enabled, the same...

CVE-2026-80554

CVE-2026-80554 affects the Linux kernel's s390/vfio_ccw subsystem. The root cause is the recursive processing of channel programs: the vfio-ccw logic splits channel programs into segments at each Transfer-In-Channel (TIC) CCW , and the combined segment count contributes to a global limit on CCWs ...