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CVE-2026-80870— drm/amdkfd: Validate CRIU-restored IDs before idr_alloc

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于KFD CRIU恢复流程未对从用户空间恢复的对象ID进行INT_MAX验证，可能导致触发IDR层警告，进而导致系统崩溃或重启。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.16% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 40e8a766a761f7fdc8530347527b344fddf6f1a8< f8687018f24037056692c1e93c7d96cc72889d5b affected
40e8a766a761f7fdc8530347527b344fddf6f1a8< 89a75e3349c4fae28cbedc711bc924cbc6293da2 affected
40e8a766a761f7fdc8530347527b344fddf6f1a8< 085ea93bda71fee600cc12a17026598eb10dd1f9 affected
40e8a766a761f7fdc8530347527b344fddf6f1a8< 543ed0f61d56501cc585162da600bbedd7c08c0f affected
40e8a766a761f7fdc8530347527b344fddf6f1a8< cb6311f25a096621ac7ffd91b50d1bb1cfb63a96 affected
40e8a766a761f7fdc8530347527b344fddf6f1a8< 85043dd49c2f51a37b22618168e3ae59ab92f0d6 affected
5.18 affected
< 5.18 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-80870

Vulnerability Information
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Vulnerability Title
drm/amdkfd: Validate CRIU-restored IDs before idr_alloc
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Validate CRIU-restored IDs before idr_alloc The KFD CRIU restore flow restores previously saved object IDs from userspace. For event restore: kfd_criu_restore_event() -> create_signal_event() / create_other_event() -> allocate_event_notification_slot() -> idr_alloc(..., *restore_id, *restore_id + 1, ...) For BO restore: criu_restore_memory_of_gpu() -> idr_alloc(..., bo_priv->idr_handle, ...) In both cases, the restored ID comes from userspace-provided CRIU data. idr_alloc() expects the ID range values to fit within signed int limits. If a restored ID is larger than INT_MAX, it can trigger a WARN in the IDR layer. A kernel WARN is undesirable because it prints a warning trace and may cause a panic or reboot on systems with panic_on_warn enabled. Smatch reported these paths as allowing unchecked userspace values to reach idr_alloc(). Add INT_MAX validation before using restored IDs in: - kfd_criu_restore_event() - criu_restore_memory_of_gpu() If the restored ID is invalid, return -EINVAL. This prevents invalid restore data from reaching the IDR layer and avoids WARN-triggering paths, while keeping valid restore behavior unchanged.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于KFD CRIU恢复流程未对从用户空间恢复的对象ID进行INT_MAX验证，可能导致触发IDR层警告，进而导致系统崩溃或重启。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 40e8a766a761f7fdc8530347527b344fddf6f1a8 ~ f8687018f24037056692c1e93c7d96cc72889d5b -
Linux Linux 5.18 -

II. Public POCs for CVE-2026-80870

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III. Intelligence Information for CVE-2026-80870

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Patches & Fixes for CVE-2026-80870 (5)

Other References for CVE-2026-80870 (1)

Same Patch Batch · Linux · 2026-09-04 · 156 CVEs total

CVE-2026-80864 RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp
CVE-2026-80855 fuse: fix invalidate lock leak on open O_TRUNC DAX failure
CVE-2026-80856 fuse: fix invalidate lock leak on setattr writeback failure
CVE-2026-80857 fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
CVE-2026-80858 fuse: publish io-uring queues with release semantics
CVE-2026-80859 fuse: fix missing barrier when checking io-uring readiness
CVE-2026-80860 fuse: fix race between interrupt and resend
CVE-2026-80861 usb: xhci: bail out of setup if the controller is inaccessible
CVE-2026-80862 nvme-tcp: fix usage of page_frag_cache
CVE-2026-80863 RDMA/rxe: Fix OOB in free_rd_atomic_resources()
CVE-2026-80869 ntfs: bound the attribute-list entry in ntfs_read_inode_mount()
CVE-2026-80874 arm64: dts: renesas: ironhide: Describe inline ECC carveouts
CVE-2026-80873 KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
CVE-2026-80872 ALSA: hda/tas2781: Cancel async firmware request at unbind
CVE-2026-80871 crypto: xilinx-trng - Remove crypto_rng interface
CVE-2026-80867 alpha/PCI: Add security_locked_down() check to pci_mmap_resource()
CVE-2026-80865 bpf: Add missing access_ok call to copy_user_syms
CVE-2026-80866 tipc: avoid busy looping in tipc_exit_net()
CVE-2026-80854 usb: gadget: f_tcm: keep port count until LUN teardown completes
CVE-2026-80868 ntfs3: Allocate iomap inline_data using alloc_page

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80870

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