kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

A flaw was found in the Kernel-based Virtual Machine KVM for x86. This vulnerability occurs when KVM incorrectly re-checks Level 1 L1 intercepts during the completion of userspace I/O emulation for a Level 2 L2 instruction. If the L1 or host userspace modifies I/O interception settings during thi...

CVE-2026-74516

A flaw was found in KVM Kernel-based Virtual Machine. When the Advanced Virtual Interrupt Controller AVIC is inhibited while a nested guest L2 is active, KVM fails to properly update x2APIC MSR intercepts for the primary guest L1. This allows the L1 guest to read the host's APIC state, send...

CVE-2026-72287 KVM: nVMX: Move vTPR vs. TPR Threshold consistency check into "normal" checks

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Move vTPR vs. TPR Threshold consistency check into "normal" checks Move the off-by-default consistency check for vmcs12.tprthreshold vs. the virtual APIC vTPR into the "normal" controls checks, as waiting until KVM has...

kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

A flaw was found in the Kernel-based Virtual Machine KVM for x86. This vulnerability occurs when KVM incorrectly re-checks Level 1 L1 intercepts during the completion of userspace I/O emulation for a Level 2 L2 instruction. If the L1 or host userspace modifies I/O interception settings during thi...

Oracle Linux 8 : kernel (ELSA-2026-45115)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-45115 advisory. - KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level Aidan Wallace RHEL-213341 CVE-2026-63807 - KVM: x86: Don't recheck L1...

AlmaLinux 9 : kernel (ALSA-2026:45192)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:45192 advisory. kernel: KVM: x86: Don't recheck L1 intercepts when completing userspace I/O CVE-2025-40026 kernel: dm log: fix out-of-bounds write due to regioncount...

kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

A flaw was found in the Kernel-based Virtual Machine KVM for x86. This vulnerability occurs when KVM incorrectly re-checks Level 1 L1 intercepts during the completion of userspace I/O emulation for a Level 2 L2 instruction. If the L1 or host userspace modifies I/O interception settings during thi...

kernel security update

An update is available for kernel. This update affects Rocky Linux SIG Cloud 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The kernel packages contain the Linux kernel, the core of any Linux...

RockyLinux 9 : kernel (RLSA-2026:45192)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:45192 advisory. kernel: KVM: x86: Don't recheck L1 intercepts when completing userspace I/O CVE-2025-40026 kernel: dm log: fix out-of-bounds write due to regioncount...

kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

A flaw was found in the Kernel-based Virtual Machine KVM for x86. This vulnerability occurs when KVM incorrectly re-checks Level 1 L1 intercepts during the completion of userspace I/O emulation for a Level 2 L2 instruction. If the L1 or host userspace modifies I/O interception settings during thi...

Important: Red Hat Security Advisory: kernel-rt security update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from...

AlmaLinux 8 : kernel (ALSA-2026:45115)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:45115 advisory. kernel: KVM: x86: Don't recheck L1 intercepts when completing userspace I/O CVE-2025-40026 kernel: xfrm single-frag length not properly limited kernel: d...

ALSA-2026:45115 Important: kernel security update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: KVM: x86: Don't recheck L1 intercepts when completing userspace I/O CVE-2025-40026 kernel: xfrm single-frag length not properly limited kernel: dm log: fix out-of-bounds write due to...

CVE-2026-46076

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Raise UD if unhandled VMMCALL isn't intercepted by L1 Explicitly synthesize a UD for VMMCALL if L2 is active, L1 does NOT want to intercept VMMCALL, nestedsvml2tlbflushenabled is true, and the hypercall is something...

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

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Raise UD if unhandled VMMCALL isn't intercepted by L1 Explicitly synthesize a UD for VMMCALL if L2 is active, L1 does NOT want to intercept VMMCALL, nestedsvml2tlbflushenabled is true, and the hypercall is something...

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

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Raise UD if unhandled VMMCALL isn't intercepted by L1 Explicitly synthesize a UD for VMMCALL if L2 is active, L1 does NOT want to intercept VMMCALL, nestedsvml2tlbflushenabled is true, and the hypercall is something...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Loads the TSC multiplier of L1 based on L1’s state, not L2’s state. When emulating a nested VM-Exit, the TSC multiplier of L1 is loaded if L1’s desired ratio does not match the current ratio. This does not occur if L1’...

Improper Synchronization

Overview Affected versions of this package are vulnerable to Improper Synchronization through the bridgeOut precompile. An attacker can restore their ERC-20 token balance and allowance after a burn operation by exploiting stale state overwrites in the dual-context state management, enabling...

Improper Synchronization

Overview Affected versions of this package are vulnerable to Improper Synchronization through the bridgeOut precompile. An attacker can restore their ERC-20 token balance and allowance after a burn operation by exploiting stale state overwrites in the dual-context state management, enabling...

Mezo: ERC-20 bridgeOut burn can be erased by a stale StateDB overwrite leading to full L1 bridge drain

Note: the fixed version of the validator client has been deployed for some time. Impact Potential full drain of L1 bridge without changing bridged balance on Mezo. Brief/Intro A malicious user can steal all ERC-20 tokens locked in the L1 bridge by repeatedly calling the bridgeOut precompile from ...