CVE-2025-40026

Ecosystem	Package	Version

Vulnerabilities

CVE-2025-40026

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O When completing emulation of instruction that generated a userspace exit for I/O, don't recheck L1 intercepts as KVM has already finished that phase of instruction execution, i.e. has already committed to allowing L2 to perform I/O. If L1 (or host userspace) modifies the I/O permission bitmaps during the exit to userspace, KVM will treat the access as being intercepted despite already having emulated the I/O access. Pivot on EMULTYPE_NO_DECODE to detect that KVM is completing emulation. Of the three users of EMULTYPE_NO_DECODE, only complete_emulated_io() (the intended "recipient") can reach the code in question. gp_interception()'s use is mutually exclusive with is_guest_mode(), and complete_emulated_insn_gp() unconditionally pairs EMULTYPE_NO_DECODE with EMULTYPE_SKIP. The bad behavior was detected by a syzkaller program that toggles port I/O interception during the userspace I/O exit, ultimately resulting in a WARN on vcpu->arch.pio.count being non-zero due to KVM no completing emulation of the I/O instruction. WARNING: CPU: 23 PID: 1083 at arch/x86/kvm/x86.c:8039 emulator_pio_in_out+0x154/0x170 [kvm] Modules linked in: kvm_intel kvm irqbypass CPU: 23 UID: 1000 PID: 1083 Comm: repro Not tainted 6.16.0-rc5-c1610d2d66b1-next-vm #74 NONE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:emulator_pio_in_out+0x154/0x170 [kvm] PKRU: 55555554 Call Trace: <TASK> kvm_fast_pio+0xd6/0x1d0 [kvm] vmx_handle_exit+0x149/0x610 [kvm_intel] kvm_arch_vcpu_ioctl_run+0xda8/0x1ac0 [kvm] kvm_vcpu_ioctl+0x244/0x8c0 [kvm] __x64_sys_ioctl+0x8a/0xd0 do_syscall_64+0x5d/0xc60 entry_SYSCALL_64_after_hwframe+0x4b/0x53 </TASK>

Published Oct 29, 2025

https://lore.kernel.org/linux-cve-announce/2025102841-CVE-2025-40026-760b@gregkh/


rpm	kernel	3.10.0-1062.0.0.0.1.el7
rpm	kernel	3.10.0-1062.1.1.0.1.el7
rpm	kernel	3.10.0-1062.1.1.el7
rpm	kernel	3.10.0-1062.1.2.0.1.el7
rpm	kernel	3.10.0-1062.1.2.el7
rpm	kernel	3.10.0-1062.12.1.0.1.el7
rpm	kernel	3.10.0-1062.12.1.el7
rpm	kernel	3.10.0-1062.18.1.0.1.el7
rpm	kernel	3.10.0-1062.18.1.el7
rpm	kernel	3.10.0-1062.4.1.0.1.el7
rpm	kernel	3.10.0-1062.4.1.el7
rpm	kernel	3.10.0-1062.4.2.el7
rpm	kernel	3.10.0-1062.4.3.0.1.el7
rpm	kernel	3.10.0-1062.4.3.el7
rpm	kernel	3.10.0-1062.7.1.0.1.el7
rpm	kernel	3.10.0-1062.7.1.el7
rpm	kernel	3.10.0-1062.9.1.0.1.el7
rpm	kernel	3.10.0-1062.9.1.el7
rpm	kernel	3.10.0-1062.el7
rpm	kernel	3.10.0-1127.0.0.0.1.el7
rpm	kernel	3.10.0-1127.10.1.0.1.el7
rpm	kernel	3.10.0-1127.10.1.el7
rpm	kernel	3.10.0-1127.13.1.0.1.el7
rpm	kernel	3.10.0-1127.13.1.el7
rpm	kernel	3.10.0-1127.18.2.0.1.el7
rpm	kernel	3.10.0-1127.18.2.el7
rpm	kernel	3.10.0-1127.19.1.0.1.el7
rpm	kernel	3.10.0-1127.19.1.0.2.el7
rpm	kernel	3.10.0-1127.19.1.el7
rpm	kernel	3.10.0-1127.8.2.0.1.el7
rpm	kernel	3.10.0-1127.8.2.el7
rpm	kernel	3.10.0-1127.el7
rpm	kernel	3.10.0-1136.el7
rpm	kernel	3.10.0-1160.102.1.0.1.el7
rpm	kernel	3.10.0-1160.102.1.0.2.el7
rpm	kernel	3.10.0-1160.105.1.0.1.el7
rpm	kernel	3.10.0-1160.105.1.0.2.el7
rpm	kernel	3.10.0-1160.108.1.0.1.el7
rpm	kernel	3.10.0-1160.108.1.0.2.el7
rpm	kernel	3.10.0-1160.11.1.0.1.el7
rpm	kernel	3.10.0-1160.11.1.el7
rpm	kernel	3.10.0-1160.114.2.0.1.el7
rpm	kernel	3.10.0-1160.114.2.0.2.el7
rpm	kernel	3.10.0-1160.118.1.0.1.el7
rpm	kernel	3.10.0-1160.118.1.0.2.el7
rpm	kernel	3.10.0-1160.119.1.0.1.el7
rpm	kernel	3.10.0-1160.119.1.0.2.el7
rpm	kernel	3.10.0-1160.119.1.0.3.el7
rpm	kernel	3.10.0-1160.119.1.0.4.el7
rpm	kernel	3.10.0-1160.119.1.0.5.el7

Ecosystem	Package	Version

Vulnerabilities

CVE-2025-40026

Published Oct 29, 2025

https://lore.kernel.org/linux-cve-announce/2025102841-CVE-2025-40026-760b@gregkh/


rpm	kernel	3.10.0-1062.0.0.0.1.el7
rpm	kernel	3.10.0-1062.1.1.0.1.el7
rpm	kernel	3.10.0-1062.1.1.el7
rpm	kernel	3.10.0-1062.1.2.0.1.el7
rpm	kernel	3.10.0-1062.1.2.el7
rpm	kernel	3.10.0-1062.12.1.0.1.el7
rpm	kernel	3.10.0-1062.12.1.el7
rpm	kernel	3.10.0-1062.18.1.0.1.el7
rpm	kernel	3.10.0-1062.18.1.el7
rpm	kernel	3.10.0-1062.4.1.0.1.el7
rpm	kernel	3.10.0-1062.4.1.el7
rpm	kernel	3.10.0-1062.4.2.el7
rpm	kernel	3.10.0-1062.4.3.0.1.el7
rpm	kernel	3.10.0-1062.4.3.el7
rpm	kernel	3.10.0-1062.7.1.0.1.el7
rpm	kernel	3.10.0-1062.7.1.el7
rpm	kernel	3.10.0-1062.9.1.0.1.el7
rpm	kernel	3.10.0-1062.9.1.el7
rpm	kernel	3.10.0-1062.el7
rpm	kernel	3.10.0-1127.0.0.0.1.el7
rpm	kernel	3.10.0-1127.10.1.0.1.el7
rpm	kernel	3.10.0-1127.10.1.el7
rpm	kernel	3.10.0-1127.13.1.0.1.el7
rpm	kernel	3.10.0-1127.13.1.el7
rpm	kernel	3.10.0-1127.18.2.0.1.el7
rpm	kernel	3.10.0-1127.18.2.el7
rpm	kernel	3.10.0-1127.19.1.0.1.el7
rpm	kernel	3.10.0-1127.19.1.0.2.el7
rpm	kernel	3.10.0-1127.19.1.el7
rpm	kernel	3.10.0-1127.8.2.0.1.el7
rpm	kernel	3.10.0-1127.8.2.el7
rpm	kernel	3.10.0-1127.el7
rpm	kernel	3.10.0-1136.el7
rpm	kernel	3.10.0-1160.102.1.0.1.el7
rpm	kernel	3.10.0-1160.102.1.0.2.el7
rpm	kernel	3.10.0-1160.105.1.0.1.el7
rpm	kernel	3.10.0-1160.105.1.0.2.el7
rpm	kernel	3.10.0-1160.108.1.0.1.el7
rpm	kernel	3.10.0-1160.108.1.0.2.el7
rpm	kernel	3.10.0-1160.11.1.0.1.el7
rpm	kernel	3.10.0-1160.11.1.el7
rpm	kernel	3.10.0-1160.114.2.0.1.el7
rpm	kernel	3.10.0-1160.114.2.0.2.el7
rpm	kernel	3.10.0-1160.118.1.0.1.el7
rpm	kernel	3.10.0-1160.118.1.0.2.el7
rpm	kernel	3.10.0-1160.119.1.0.1.el7
rpm	kernel	3.10.0-1160.119.1.0.2.el7
rpm	kernel	3.10.0-1160.119.1.0.3.el7
rpm	kernel	3.10.0-1160.119.1.0.4.el7
rpm	kernel	3.10.0-1160.119.1.0.5.el7

CVE-2025-40026 | Components Impacted | Sonatype Guide | Sonatype Guide

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CVE-2025-40026