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bdu:2026-13888

BELL-CVE-2026-46317

Affected: Alpaquita:25: linux-lts, Alpaquita:stream: linux-lts

certfr-2026-avi-0782 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE. Certaines d'entre elles permettent à un at…

certfr-2026-avi-0782

EUVD-2026-348072

fkie_cve-2026-46317

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Reassign nested_mmus array behind mmu_lock

kvm->arch.nested_mmus[] is walked under kvm->mmu_lock, including from the MMU notifier path (kvm_unmap_gfn_range() -> kvm_nested_s2_unmap()), which can run at any time. kvm_vcpu_init_nested() reallocates the array and frees the old buffer while holding only kvm->arch.config_lock, so such a walker can reference the freed array.

Allocate the new array outside of mmu_lock, as the allocation can sleep. Under the lock, copy the existing entries, fix up the back pointers and reassign the array. Free the old buffer after dropping the lock, as kvfree() can sleep as well.

GHSA-5vrh-8j67-jvj4

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Reassign nested_mmus array behind mmu_lock

openSUSE-SU-2026:11014-1 — kernel-devel-7.0.12-1.1 on GA media

kernel-devel-7.0.12-1.1 on GA media

RHSA-2026:72624 — Red Hat Security Advisory: kernel security, bug fix, and enhancement update

kernel: ext4: fix e4b bitmap inconsistency reports kernel: KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 kernel: KVM: arm64: Reassign nested_mmus array behind mmu_lock kernel: fhandle: fix UAF due to unlocked ->mnt_ns read in may_decode_fh() kernel: perf/core: Detach event groups during remove_on_exec kernel: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets kernel: perf: Reject exited events as group leaders kernel: crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req() kernel: nvme-tcp: reject a read that transferred too few bytes kernel: KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation

RLSA-2026:72624 — Important: kernel security, bug fix, and enhancement update

Affected: Rocky Linux:10: kernel

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1 (CVE-2026-46076)

* kernel: ext4: fix e4b bitmap inconsistency reports (CVE-2026-45942)

* kernel: KVM: arm64: Reassign nested_mmus array behind mmu_lock (CVE-2026-46317)

* kernel: fhandle: fix UAF due to unlocked ->mnt_ns read in may_decode_fh() (CVE-2026-53341)

* kernel: perf/core: Detach event groups during remove_on_exec (CVE-2026-64556)

* kernel: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets (CVE-2026-68299)

* kernel: crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req() (CVE-2026-80522)

* kernel: perf: Reject exited events as group leaders (CVE-2026-74753)

* kernel: nvme-tcp: reject a read that transferred too few bytes (CVE-2026-89480)

* kernel: KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation (CVE-2026-89775)

Bug Fix(es) and Enhancement(s):

* KVM: s390: Limit adapter indicator access to mapped page [rhel-10.2.z] (JIRA:Rocky Linux-188661)

* crypto: xxhash64 should not be fips approved [rhel-10.2.z] (JIRA:Rocky Linux-254943)

* kata-tdx TD vCPU stuck at reset vector (EIP=0xFFF0) on Intel Xeon 6 (Granite Rapids / Sierra Forest) ? guest never executes. (10.2.z) (JIRA:Rocky Linux-260402)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to…

SUSE-SU-2026:22099-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2026-46317

Affected: Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:18.04:LTS: linux-aws-5.0, Ubuntu:18.04:LTS: linux-aws-5.3, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3, Ubuntu:18.04:LTS: linux-gke-4.15, Ubuntu:18.04:LTS: linux-gke-5.4 and 127 more

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Reassign nested_mmus array behind mmu_lock kvm->arch.nested_mmus[] is walked under kvm->mmu_lock, including from the MMU notifier path (kvm_unmap_gfn_range() -> kvm_nested_s2_unmap()), which can run at any time. kvm_vcpu_init_nested() reallocates the array and frees the old buffer while holding only kvm->arch.config_lock, so such a walker can reference the freed array. Allocate the new array outside of mmu_lock, as the allocation can sleep. Under the lock, copy the existing entries, fix up the back pointers and reassign the array. Free the old buffer after dropping the lock, as kvfree() can sleep as well.

WID-SEC-W-2026-1870 — Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Eiin Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen oder andere, nicht näher bezeichnete Angriffe durchzuführen.