CVE-2026-45987None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Sync interrupt shadow to cached vmcb12 after VMRUN of L2 After VMRUN in guest mode, nested_sync_control_from_vmcb02() syncs fields written by the CPU from v…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
KVM: nSVM: Sync interrupt shadow to cached vmcb12 after VMRUN of L2
After VMRUN in guest mode, nested_sync_control_from_vmcb02() syncs fields written by the CPU from vmcb02 to the cached vmcb12. This is because the cached vmcb12 is used as the authoritative copy of some of the controls, and is the payload when saving/restoring nested state.
int_state is also written by the CPU, specifically bit 0 (i.e. SVM_INTERRUPT_SHADOW_MASK) for nested VMs, but it is not sync'd to cached vmcb12. This does not cause a problem if KVM_SET_NESTED_STATE preceeds KVM_SET_VCPU_EVENTS in the restore path, as an interrupt shadow would be correctly restored to vmcb02 (KVM_SET_VCPU_EVENTS overwrites what KVM_SET_NESTED_STATE restored in int_state).
However, if KVM_SET_VCPU_EVENTS preceeds KVM_SET_NESTED_STATE, an interrupt shadow would be restored into vmcb01 instead of vmcb02. This would mostly be benign for L1 (delays an interrupt), but not for L2. For L2, the vCPU could hang (e.g. if a wakeup interrupt is delivered before a HLT that should have been in an interrupt shadow).
Sync int_state to the cached vmcb12 in nested_sync_control_from_vmcb02() to avoid this problem. With that, KVM_SET_NESTED_STATE restores the correct interrupt shadow state, and if KVM_SET_VCPU_EVENTS follows it would overwrite it with the same value.
Linux >= cc440cdad5b7a4c1de12dace725209eb3e0cf663 < 0c1f74d8b74d8a31751fb6ea5417e48e02c93b58Linux >= cc440cdad5b7a4c1de12dace725209eb3e0cf663 < 4b44aa1a134e499c4517597118378b308602a16cLinux >= cc440cdad5b7a4c1de12dace725209eb3e0cf663 < e39a77a9b1e17d2d831c304eafac4c41a784a0beLinux >= cc440cdad5b7a4c1de12dace725209eb3e0cf663 < 1709418535a8df95532999d61b03d59975280258Linux >= cc440cdad5b7a4c1de12dace725209eb3e0cf663 < 2f950eeb27af6885416232761700b8820cae0a61Linux >= cc440cdad5b7a4c1de12dace725209eb3e0cf663 < 497f6af9679fc9c6ce2f438e11ed5d51b1aa8297Linux >= cc440cdad5b7a4c1de12dace725209eb3e0cf663 < e0377e52f3c10ee572732d11b04625b7f517a862Linux >= cc440cdad5b7a4c1de12dace725209eb3e0cf663 < 03bee264f8ebfd39e0254c98e112d033a7aa9055Linux 5.8Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-99284Nonenet: skbuff: propagate shared-frag marker in skb_zerocopy()
CVE-2026-99283Nonenetfilter: conntrack: tcp: use UNACK timeout for non-closing RST packets
CVE-2026-99272Nonesmb: client: validate the data area in SMB2_read()
CVE-2026-99271NoneALSA: line6: Clear prev_fbuf on capture buffer release
CVE-2026-99273Noneksmbd: reserve space for the UTF-16 terminator in stream info
CVE-2026-99275Nonesmb: client: reject short SESSION_SETUP responses