CVE-2026-45862— iommu/vt-d: Flush cache for PASID table before using it
Possible ATT&CK Techniques 2AI
T1068 · Exploitation for Privilege Escalation T1201 · Password Policy DiscoveryAffected Version Matrix 25
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/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
II. Public POCs for CVE-2026-45862
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-45862 (8)
Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total
| CVE-2026-46039 | 9.8 CRITICAL | rxgk: Fix potential integer overflow in length check |
| 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-2026-46043 | 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-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-2026-45878 | 7.8 HIGH | drm/amdkfd: Fix watch_id bounds checking in debug address watch v2 |
| CVE-2026-45935 | 7.8 HIGH | fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot |
| CVE-2026-46058 | 7.8 HIGH | media: amphion: Fix race between m2m job_abort and device_run |
| CVE-2026-46011 | 7.8 HIGH | media: mtk-jpeg: fix use-after-free in release path due to uncancelled work |
| CVE-2026-45894 | 7.8 HIGH | iommu/vt-d: Clear Present bit before tearing down PASID entry |
| CVE-2026-46015 | 7.8 HIGH | tcp: call sk_data_ready() after listener migration |
| CVE-2026-45852 | 7.8 HIGH | RDMA/rxe: Fix double free in rxe_srq_from_init |
| CVE-2026-45951 | 7.8 HIGH | bpf: Fix a potential use-after-free of BTF object |
Showing top 20 of 276 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf
Same vendor: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf
V. Comments for CVE-2026-45862
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