[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2025-40026":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":21,"related":22,"reserved_at":9,"published_at":23,"modified_at":24,"state":9,"summary":25,"references_raw":27,"kevs":34,"epss":9,"epss_history":35,"metrics":36,"affected":37},"DEBIAN-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:    \u003CTASK>    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    \u003C/TASK>",null,[],[],[],[14],{"_key":15},"CVE-2025-40026",[17,19],{"_key":18},"DLA-4379-1",{"_key":20},"DSA-6053-1",[],[],"2025-10-28T10:15:42.167Z","2026-04-28T20:30:25.243079Z",{"cisa_kev":26,"cisa_ransomware":26,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[28],{"url":29,"sources":30,"tags":32},"https://security-tracker.debian.org/tracker/CVE-2025-40026",[31],"osv_debian",[33],"Advisory",[],[],[],[38,59],{"ecosystem":39,"name":40,"vendor":41,"product":40,"cpe_part":9,"purl_type":42,"purl_namespace":41,"purl_name":40,"source":9,"versions":43},"Debian","linux","debian","deb",[44,50,53,56],{"version":45,"is_range":46,"range_type":47,"version_start":9,"version_start_type":9,"version_end":48,"version_end_type":49,"fixed_in":9},"lt5_10_247_1",true,"ecosystem","5.10.247-1","excluding",{"version":51,"is_range":46,"range_type":47,"version_start":9,"version_start_type":9,"version_end":52,"version_end_type":49,"fixed_in":9},"lt6_1_158_1","6.1.158-1",{"version":54,"is_range":46,"range_type":47,"version_start":9,"version_start_type":9,"version_end":55,"version_end_type":49,"fixed_in":9},"lt6_12_57_1","6.12.57-1",{"version":57,"is_range":46,"range_type":47,"version_start":9,"version_start_type":9,"version_end":58,"version_end_type":49,"fixed_in":9},"lt6_17_6_1","6.17.6-1",{"ecosystem":39,"name":60,"vendor":41,"product":60,"cpe_part":9,"purl_type":42,"purl_namespace":41,"purl_name":60,"source":9,"versions":61},"linux-6.1",[62],{"version":63,"is_range":46,"range_type":47,"version_start":9,"version_start_type":9,"version_end":64,"version_end_type":49,"fixed_in":9},"lt6_1_158_1~deb11u1","6.1.158-1~deb11u1"]