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CVE-2025-40102— Linux kernel 安全漏洞

EPSS 0.06% · P19
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I. CVE-2025-40102の基本情報

脆弱性情報

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脆弱性タイトル
KVM: arm64: Prevent access to vCPU events before init
ソース: NVD (National Vulnerability Database)
脆弱性説明
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Prevent access to vCPU events before init Another day, another syzkaller bug. KVM erroneously allows userspace to pend vCPU events for a vCPU that hasn't been initialized yet, leading to KVM interpreting a bunch of uninitialized garbage for routing / injecting the exception. In one case the injection code and the hyp disagree on whether the vCPU has a 32bit EL1 and put the vCPU into an illegal mode for AArch64, tripping the BUG() in exception_target_el() during the next injection: kernel BUG at arch/arm64/kvm/inject_fault.c:40! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP CPU: 3 UID: 0 PID: 318 Comm: repro Not tainted 6.17.0-rc4-00104-g10fd0285305d #6 PREEMPT Hardware name: linux,dummy-virt (DT) pstate: 21402009 (nzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : exception_target_el+0x88/0x8c lr : pend_serror_exception+0x18/0x13c sp : ffff800082f03a10 x29: ffff800082f03a10 x28: ffff0000cb132280 x27: 0000000000000000 x26: 0000000000000000 x25: ffff0000c2a99c20 x24: 0000000000000000 x23: 0000000000008000 x22: 0000000000000002 x21: 0000000000000004 x20: 0000000000008000 x19: ffff0000c2a99c20 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 00000000200000c0 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : ffff800082f03af8 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff800080f621f0 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 000000000040009b x1 : 0000000000000003 x0 : ffff0000c2a99c20 Call trace: exception_target_el+0x88/0x8c (P) kvm_inject_serror_esr+0x40/0x3b4 __kvm_arm_vcpu_set_events+0xf0/0x100 kvm_arch_vcpu_ioctl+0x180/0x9d4 kvm_vcpu_ioctl+0x60c/0x9f4 __arm64_sys_ioctl+0xac/0x104 invoke_syscall+0x48/0x110 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x34/0xf0 el0t_64_sync_handler+0xa0/0xe4 el0t_64_sync+0x198/0x19c Code: f946bc01 b4fffe61 9101e020 17fffff2 (d4210000) Reject the ioctls outright as no sane VMM would call these before KVM_ARM_VCPU_INIT anyway. Even if it did the exception would've been thrown away by the eventual reset of the vCPU's state.
ソース: NVD (National Vulnerability Database)
CVSS情報
N/A
ソース: NVD (National Vulnerability Database)
脆弱性タイプ
N/A
ソース: NVD (National Vulnerability Database)
脆弱性タイトル
Linux kernel 安全漏洞
ソース: CNNVD (China National Vulnerability Database)
脆弱性説明
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,该漏洞源于允许在vCPU初始化前访问vCPU事件,可能导致异常注入错误。
ソース: CNNVD (China National Vulnerability Database)
CVSS情報
N/A
ソース: CNNVD (China National Vulnerability Database)
脆弱性タイプ
N/A
ソース: CNNVD (China National Vulnerability Database)

影響を受ける製品

ベンダープロダクト影響を受けるバージョンCPE購読
LinuxLinux b7b27facc7b50a5fce0afaa3df56157136ce181a ~ 64a04e6320fc5affbadc59dc7024d79f909bfe84 -
LinuxLinux 4.19 -

II. CVE-2025-40102の公開POC

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III. CVE-2025-40102のインテリジェンス情報

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Same Patch Batch · Linux · 2025-10-30 · 20 CVEs total

CVE-2025-40095usb: gadget: f_rndis: Refactor bind path to use __free()
CVE-2025-40105vfs: Don't leak disconnected dentries on umount
CVE-2025-40104ixgbevf: fix mailbox API compatibility by negotiating supported features
CVE-2025-40103smb: client: Fix refcount leak for cifs_sb_tlink
CVE-2025-40100btrfs: do not assert we found block group item when creating free space tree
CVE-2025-40101btrfs: fix memory leaks when rejecting a non SINGLE data profile without an RST
CVE-2025-40099cifs: parse_dfs_referrals: prevent oob on malformed input
CVE-2025-40098ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_get_acpi_mute_state()
CVE-2025-40097ALSA: hda: Fix missing pointer check in hda_component_manager_init function
CVE-2025-40096drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies
CVE-2025-40086drm/xe: Don't allow evicting of BOs in same VM in array of VM binds
CVE-2025-40094usb: gadget: f_acm: Refactor bind path to use __free()
CVE-2025-40093usb: gadget: f_ecm: Refactor bind path to use __free()
CVE-2025-40092usb: gadget: f_ncm: Refactor bind path to use __free()
CVE-2025-40090ksmbd: fix recursive locking in RPC handle list access
CVE-2025-40091ixgbe: fix too early devlink_free() in ixgbe_remove()
CVE-2025-40089cxl/features: Add check for no entries in cxl_feature_info
CVE-2025-40088hfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp()
CVE-2025-40087NFSD: Define a proc_layoutcommit for the FlexFiles layout type

IV. 関連脆弱性

V. CVE-2025-40102へのコメント

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