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

Goal: 1000 CNY · Raised: 1325 CNY

100%
Buy Us a Coffee

CVE-2026-46317— KVM: arm64: Reassign nested_mmus array behind mmu_lock

CVSS 8.8 · High EPSS 0.12% · P2

Affected Version Matrix 8

VendorProductVersion RangeStatus
LinuxLinux4f128f8e1aaac189f83d0f828bcdb2986d8d2e51< 918450ad6010df6ecd2efde12a1409e011da22d6affected
4f128f8e1aaac189f83d0f828bcdb2986d8d2e51< 4424dbcb06d68e34e51c019a5781a7dc00731971affected
4f128f8e1aaac189f83d0f828bcdb2986d8d2e51< 70543358fa08e0f7cebc3447c3b70fe97ad7aaa8affected
6.11affected
< 6.11unaffected
6.18.35≤ 6.18.*unaffected
7.0.12≤ 7.0.*unaffected
7.1≤ *unaffected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-46317

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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: arm64: Reassign nested_mmus array behind mmu_lock
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Reassign nested_mmus array behind mmu_lock kvm->arch.nested_mmus[] is walked under kvm->mmu_lock, including from the MMU notifier path (kvm_unmap_gfn_range() -> kvm_nested_s2_unmap()), which can run at any time. kvm_vcpu_init_nested() reallocates the array and frees the old buffer while holding only kvm->arch.config_lock, so such a walker can reference the freed array. Allocate the new array outside of mmu_lock, as the allocation can sleep. Under the lock, copy the existing entries, fix up the back pointers and reassign the array. Free the old buffer after dropping the lock, as kvfree() can sleep as well.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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_vcpu_init_nested()在仅持有kvm->arch.config_lock时重新分配并释放kvm->arch.nested_mmus数组，而该数组在kvm->mmu_lock下被遍历，可能导致引用已释放数组。
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 4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 ~ 918450ad6010df6ecd2efde12a1409e011da22d6 -
LinuxLinux 6.11 -

II. Public POCs for CVE-2026-46317

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-46317

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-46317 (2)

Same Patch Batch · Linux · 2026-06-09 · 21 CVEs total

CVE-2026-463259.8 CRITICALRDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE
CVE-2026-463169.3 CRITICALKVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry
CVE-2026-463268.4 HIGHiio: pressure: mprls0025pa: fix spi_transfer struct initialisation
CVE-2026-463328.0 HIGHgreybus: gb-beagleplay: bound bootloader receive buffering
CVE-2026-529077.8 HIGHmedia: rockchip: rkcif: fix off by one bugs
CVE-2026-463197.8 HIGHnet/sched: act_ct: Only release RCU read lock after ct_ft
CVE-2026-463237.8 HIGHnet: gro: don't merge zcopy skbs
CVE-2026-463307.8 HIGHRevert "net/smc: Introduce TCP ULP support"
CVE-2026-463247.8 HIGHnetfilter: nf_tables: use list_del_rcu for netlink hooks
CVE-2026-463277.8 HIGHdm: fix unlocked test for dm_suspended_md
CVE-2026-529067.7 HIGH9p: fix access mode flags being ORed instead of replaced
CVE-2026-463207.4 HIGHtap: free page on error paths in tap_get_user_xdp()
CVE-2026-463287.3 HIGHapparmor: fix rlimit for posix cpu timers
CVE-2026-463227.1 HIGHtun: free page on build_skb failure in tun_xdp_one()
CVE-2026-463217.1 HIGHtun: free page on short-frame rejection in tun_xdp_one()
CVE-2026-46329erofs: handle end of filesystem properly for file-backed mounts
CVE-2026-52904drm/nouveau: fix nvkm_device leak on aperture removal failure
CVE-2026-46318Revert "mm/hugetlbfs: update hugetlbfs to use mmap_prepare"
CVE-2026-52905mm/damon/core: disallow non-power of two min_region_sz on damon_start()
CVE-2026-46315io_uring/waitid: clear waitid info before copying it to userspace

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46317

No comments yet

Leave a comment