Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1310 CNY

100%
Buy Us a Coffee

CVE-2026-45987— KVM: nSVM: Sync interrupt shadow to cached vmcb12 after VMRUN of L2

AI Predicted 5.5 Difficulty: Moderate EPSS 0.03% · P10

Possible ATT&CK Techniques 1AI

T1059.010 · AutoHotKey & AutoIT

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxcc440cdad5b7a4c1de12dace725209eb3e0cf663< 0c1f74d8b74d8a31751fb6ea5417e48e02c93b58affected
cc440cdad5b7a4c1de12dace725209eb3e0cf663< 4b44aa1a134e499c4517597118378b308602a16caffected
cc440cdad5b7a4c1de12dace725209eb3e0cf663< e39a77a9b1e17d2d831c304eafac4c41a784a0beaffected
cc440cdad5b7a4c1de12dace725209eb3e0cf663< 1709418535a8df95532999d61b03d59975280258affected
cc440cdad5b7a4c1de12dace725209eb3e0cf663< 2f950eeb27af6885416232761700b8820cae0a61affected
cc440cdad5b7a4c1de12dace725209eb3e0cf663< 497f6af9679fc9c6ce2f438e11ed5d51b1aa8297affected
cc440cdad5b7a4c1de12dace725209eb3e0cf663< e0377e52f3c10ee572732d11b04625b7f517a862affected
cc440cdad5b7a4c1de12dace725209eb3e0cf663< 03bee264f8ebfd39e0254c98e112d033a7aa9055affected
… +10 more rows
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-45987

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
KVM: nSVM: Sync interrupt shadow to cached vmcb12 after VMRUN of L2
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于KVM nSVM在VMRUN后未将中断阴影同步到缓存的vmcb12，可能导致中断阴影恢复错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux cc440cdad5b7a4c1de12dace725209eb3e0cf663 ~ 0c1f74d8b74d8a31751fb6ea5417e48e02c93b58 -
LinuxLinux 5.8 -

II. Public POCs for CVE-2026-45987

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-45987

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-45987 (8)

Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total

CVE-2026-460399.8 CRITICALrxgk: Fix potential integer overflow in length check
CVE-2026-458989.8 CRITICALRDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-459889.8 CRITICALrxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-459729.8 CRITICALsmb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-460439.1 CRITICALRDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-460108.1 HIGHrxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-460998.1 HIGHnet: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-460767.9 HIGHKVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-458947.8 HIGHiommu/vt-d: Clear Present bit before tearing down PASID entry
CVE-2026-459597.8 HIGHcrypto: ccp - Fix a crash due to incorrect cleanup usage of kfree
CVE-2026-460117.8 HIGHmedia: mtk-jpeg: fix use-after-free in release path due to uncancelled work
CVE-2026-460157.8 HIGHtcp: call sk_data_ready() after listener migration
CVE-2026-458527.8 HIGHRDMA/rxe: Fix double free in rxe_srq_from_init
CVE-2026-460587.8 HIGHmedia: amphion: Fix race between m2m job_abort and device_run
CVE-2026-458617.8 HIGHgfs2: Fix slab-use-after-free in qd_put
CVE-2026-460537.8 HIGHnet: rds: fix MR cleanup on copy error

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45987

No comments yet

Leave a comment