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CVE-2026-23213— drm/amd/pm: Disable MMIO access during SMU Mode 1 reset

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，该漏洞源于在SMU模式1重置期间未禁用MMIO访问，可能导致系统崩溃。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux ea8139d8d59bd6f014b317e7423345169a56fe49< c1853ebbec980d5c05d431bfd6ded73b1363fd00 affected
ea8139d8d59bd6f014b317e7423345169a56fe49< cd7ff7fd3e4b77f0b5a292e0926532eaa07c5162 affected
ea8139d8d59bd6f014b317e7423345169a56fe49< 0de604d0357d0d22cbf03af1077d174b641707b6 affected
5.9 affected
< 5.9 unaffected
6.12.70≤ 6.12.* unaffected
6.18.10≤ 6.18.* unaffected
6.19≤ * unaffected
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I. Basic Information for CVE-2026-23213

Vulnerability Information
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Vulnerability Title
drm/amd/pm: Disable MMIO access during SMU Mode 1 reset
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/pm: Disable MMIO access during SMU Mode 1 reset During Mode 1 reset, the ASIC undergoes a reset cycle and becomes temporarily inaccessible via PCIe. Any attempt to access MMIO registers during this window (e.g., from interrupt handlers or other driver threads) can result in uncompleted PCIe transactions, leading to NMI panics or system hangs. To prevent this, set the `no_hw_access` flag to true immediately after triggering the reset. This signals other driver components to skip register accesses while the device is offline. A memory barrier `smp_mb()` is added to ensure the flag update is globally visible to all cores before the driver enters the sleep/wait state. (cherry picked from commit 7edb503fe4b6d67f47d8bb0dfafb8e699bb0f8a4)
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，该漏洞源于在SMU模式1重置期间未禁用MMIO访问，可能导致系统崩溃。
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 ea8139d8d59bd6f014b317e7423345169a56fe49 ~ c1853ebbec980d5c05d431bfd6ded73b1363fd00 -
Linux Linux 5.9 -

II. Public POCs for CVE-2026-23213

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III. Intelligence Information for CVE-2026-23213

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Same Patch Batch · Linux · 2026-02-18 · 31 CVEs total

CVE-2025-71234 8.8 HIGH wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add
CVE-2026-23230 8.8 HIGH smb: client: split cached_fid bitfields to avoid shared-byte RMW races
CVE-2026-23226 8.8 HIGH ksmbd: add chann_lock to protect ksmbd_chann_list xarray
CVE-2026-23227 7.8 HIGH drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to
CVE-2026-23225 7.8 HIGH sched/mmcid: Don't assume CID is CPU owned on mode switch
CVE-2026-23224 7.8 HIGH erofs: fix UAF issue for file-backed mounts w/ directio option
CVE-2026-23222 7.8 HIGH crypto: omap - Allocate OMAP_CRYPTO_FORCE_COPY scatterlists correctly
CVE-2025-71236 7.5 HIGH scsi: qla2xxx: Validate sp before freeing associated memory
CVE-2025-71235 scsi: qla2xxx: Delay module unload while fabric scan in progress
CVE-2026-23212 bonding: annotate data-races around slave->last_rx
CVE-2026-23229 crypto: virtio - Add spinlock protection with virtqueue notification
CVE-2026-23228 smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()
CVE-2025-71225 md: suspend array while updating raid_disks via sysfs
CVE-2026-23223 xfs: fix UAF in xchk_btree_check_block_owner
CVE-2026-23221 bus: fsl-mc: fix use-after-free in driver_override_show()
CVE-2026-23220 ksmbd: fix infinite loop caused by next_smb2_rcv_hdr_off reset in error paths
CVE-2025-71237 nilfs2: Fix potential block overflow that cause system hang
CVE-2025-71227 wifi: mac80211: don't WARN for connections on invalid channels
CVE-2026-23211 mm, swap: restore swap_space attr aviod kernel panic
CVE-2025-71233 PCI: endpoint: Avoid creating sub-groups asynchronously

Showing top 20 of 31 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23213

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