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CVE-2026-45862— iommu/vt-d: Flush cache for PASID table before using it

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PASID目录条目写入PASID表地址前未执行CPU缓存刷新，可能导致非一致性IOMMU硬件在RAM内容仍为随机旧数据时使用该表。

CVSS 7.8 · High EPSS 0.15% · P4

Affected Version Matrix 25

VendorProduct Version RangeStatus
Linux Linux 7e00b52c8cdd9d3a985d63d72ecae7bde6314883< cd75e77125c8a51754ca4cd60b4ca083ed735d1d affected
5c65f097124770c3e5b9b83ed1a8b68c119bc7b5< 0616137b70e6d9a547d4b60df8e1b64e36d83661 affected
2bed9455db7cc0ab7ece6b3d846472097b52855a< 36990407cdd257473607e33802d00e978af2759e affected
194b3348bdbb7db65375c72f3f774aee4cc6614e< c93f23375d8c410954b0df825e814b632fd62b9d affected
194b3348bdbb7db65375c72f3f774aee4cc6614e< 5962c30a6f05ea1ab73f039e235bb30716243517 affected
194b3348bdbb7db65375c72f3f774aee4cc6614e< 36244dfd3853f7bf89d03b8e90d56b23ce7fbc16 affected
194b3348bdbb7db65375c72f3f774aee4cc6614e< d15cda135148ea7ba929cfdbcf208182bc29a7aa affected
194b3348bdbb7db65375c72f3f774aee4cc6614e< 22d169bdd2849fe6bd18c2643742e1c02be6451c affected
… +17 more rows
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I. Basic Information for CVE-2026-45862

Vulnerability Information
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Vulnerability Title
iommu/vt-d: Flush cache for PASID table before using it
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Flush cache for PASID table before using it When writing the address of a freshly allocated zero-initialized PASID table to a PASID directory entry, do that after the CPU cache flush for this PASID table, not before it, to avoid the time window when this PASID table may be already used by non-coherent IOMMU hardware while its contents in RAM is still some random old data, not zero-initialized.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
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PASID目录条目写入PASID表地址前未执行CPU缓存刷新，可能导致非一致性IOMMU硬件在RAM内容仍为随机旧数据时使用该表。
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 7e00b52c8cdd9d3a985d63d72ecae7bde6314883 ~ cd75e77125c8a51754ca4cd60b4ca083ed735d1d -
Linux Linux 6.3 -

II. Public POCs for CVE-2026-45862

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III. Intelligence Information for CVE-2026-45862

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Patches & Fixes for CVE-2026-45862 (8)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45935 7.8 HIGH fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
CVE-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-45956 7.8 HIGH drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
CVE-2026-45910 7.8 HIGH RDMA/rxe: Fix race condition in QP timer handlers
CVE-2026-45959 7.8 HIGH crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree
CVE-2026-45933 7.8 HIGH bpf: Preserve id of register in sync_linked_regs()
CVE-2026-45861 7.8 HIGH gfs2: Fix slab-use-after-free in qd_put

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45862

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