CVE-2026-89924

A flaw was found in the Linux kernel's KVM Kernel-based Virtual Machine component for s390 architecture. When handling guest debug requests, a memory leak occurs if a watchpoint import fails. A local guest user could repeatedly trigger this flaw, leading to a continuous leak of memory buffers. Th...

CVE-2026-89923

A flaw was found in KVM s390. A memory leak occurs in the Kernel-based Virtual Machine KVM for s390 architecture when a virtual CPU vCPU is destroyed while hardware breakpoints are still active, as the associated debug data is not properly freed. A local attacker or a malicious guest operating...

kernel: KVM: s390: vsie: zero stale crypto bits

A flaw was found in the Linux kernel's KVM s390 Virtual Shared Inter-Partition Emulation VSIE component. When shadowing crypto access bits from a format0 apcb, stale crypto bits were not properly cleared. This oversight could allow a nested guest to potentially access a device that should no long...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: s390/uv: Do not call foliowaitwriteback without a folio reference. foliowaitwriteback requires that no spinlocks are held and that a folio reference is held, as documented. After we removed the PTL, the folio object could be free...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Call srcu when importing watchpoint data. The importwpinfo function backs up the original guest memory contents of a watchpoint using readguestabs. This function is equivalent to kvmreadguest, and it resolves the issue...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Validates the length of CCA AES cipher key requests The ccacipher2protkey function derives the copy length for the CPRB parameter directly from the length field in the key token. If the token length exceeds the...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: s390/vfioccw: Ensure that the index values for read/write regions are within the correct range. The introduction of the capability chain correctly clipped the region indexes to the range of the capabilities themselves, but it was...

kernel: KVM: s390: vsie: zero stale crypto bits

A flaw was found in the Linux kernel's KVM s390 Virtual Shared Inter-Partition Emulation VSIE component. When shadowing crypto access bits from a format0 apcb, stale crypto bits were not properly cleared. This oversight could allow a nested guest to potentially access a device that should no long...

CVE-2026-80921

A flaw was found in the Linux kernel's KVM s390 Virtual Shared Inter-Partition Emulation VSIE component. When shadowing crypto access bits from a format0 apcb, stale crypto bits were not properly cleared. This oversight could allow a nested guest to potentially access a device that should no long...

kernel security, bug fix, and enhancement update

4.18.0-553.171.1 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list olkmodsigningkey.pem Orabug: 29539237 - Update x509.genkey Orabug: 24817676 - Conflict with shim-ia32 and...

USN-8816-4 linux-gke 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; -...

kernel: s390/pkey: Check length in pkey_pckmo handler implementation

A flaw was found in the Linux kernel, specifically within the s390/pkey component. This vulnerability occurs because the pkeypckmo handler function does not explicitly check the length of the target buffer. If the generated output data exceeds the provided buffer's length, the handler function...

SUSE CVE-2026-97589

In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix wrong return code to engine in asynch callbacks When cryptofinalizehashrequest or cryptofinalizeskcipherrequest explicitly completes a request, the doonerequest callback must return 0 to indicate successful...

SUSE CVE-2026-97590

In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix missing scrub of temp buffers with PAES algorithm In function ctrpaesdocrypt there is a buffer used to process remaining bytes AESBLOCKSIZE. This buffer was not scrubbed and thus could lead to expose of unwanted...

SUSE CVE-2026-97592

In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix missing scrub of temp buffers with AES ctr and gcm algorithm In function ctraescrypt there is a buffer used to process remaining bytes AESBLOCKSIZE. This buffer was not scrubbed and thus could lead to expose of...

SUSE CVE-2026-98024

In the Linux kernel, the following vulnerability has been resolved: s390/ism: folioput after error dmb-cpuaddr was allocated via folioalloc. Use folioput instead of kfree in the error exit of ismallocdmb to avoid slab allocator corruption. While at it, reset dmb-cpuaddr after folioput to avoid...

SUSE CVE-2026-97526

In the Linux kernel, the following vulnerability has been resolved: s390/pai: Support CPU hotplug for PMU PAI The command 'perf stat -e paicrypto/CRYPTOALL/ -- ' crashes the kernel when CPUs are hotplug added during that run. Root cause is the missing allocation of per-CPU data structures for tha...

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...

SUSE CVE-2026-97591

In the Linux kernel, the following vulnerability has been resolved: s390/crypto: Fix handling of EBUSY in PHMAC when req is pushed to crypto engine When a request is transferred to the engine via cryptotransferhashrequesttoengine there are two return codes signaling a successful transfer:...