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CVE-2026-46065— fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info

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fbdev defio中延迟I/O与struct fb_info生命周期断开，可能导致设备热拔后访问未定义状态。

CVSS 7.8 · High EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 60b59beafba875aef6d378078bce0baf2287ae14< 4aab89603b637a2e441b38808c4f6fe7d1184df6 affected
60b59beafba875aef6d378078bce0baf2287ae14< 4fda0d6b45faad44926dd3e4f55f118d899b2e27 affected
60b59beafba875aef6d378078bce0baf2287ae14< 2a40f8bc9bb713329f1c35ffc199ee961a7135b0 affected
60b59beafba875aef6d378078bce0baf2287ae14< 2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066 affected
60b59beafba875aef6d378078bce0baf2287ae14< 25c2b77bc463f29ee71a54b883548baf9386a0db affected
60b59beafba875aef6d378078bce0baf2287ae14< a0aafb421dd15e935d81543152617f2742cefa70 affected
60b59beafba875aef6d378078bce0baf2287ae14< 9ded47ad003f09a94b6a710b5c47f4aa5ceb7429 affected
2.6.22 affected
… +8 more rows
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I. Basic Information for CVE-2026-46065

Vulnerability Information
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Vulnerability Title
fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info Hold state of deferred I/O in struct fb_deferred_io_state. Allocate an instance as part of initializing deferred I/O and remove it only after the final mapping has been closed. If the fb_info and the contained deferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info to invalidate the mapping. Any access will then result in a SIGBUS signal. Fixes a long-standing problem, where a device hot-unplug happens while user space still has an active mapping of the graphics memory. The hot- unplug frees the instance of struct fb_info. Accessing the memory will operate on undefined state.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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fbdev defio中延迟I/O与struct fb_info生命周期断开，可能导致设备热拔后访问未定义状态。
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 60b59beafba875aef6d378078bce0baf2287ae14 ~ 4aab89603b637a2e441b38808c4f6fe7d1184df6 -
Linux Linux 2.6.22 -

II. Public POCs for CVE-2026-46065

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III. Intelligence Information for CVE-2026-46065

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Patches & Fixes for CVE-2026-46065 (7)

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

CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
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-2026-45956 7.8 HIGH drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
CVE-2026-46058 7.8 HIGH media: amphion: Fix race between m2m job_abort and device_run
CVE-2026-46053 7.8 HIGH net: rds: fix MR cleanup on copy error
CVE-2026-46062 7.8 HIGH ntfs3: fix integer overflow in run_unpack() volume boundary check
CVE-2026-45959 7.8 HIGH crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree
CVE-2026-46011 7.8 HIGH media: mtk-jpeg: fix use-after-free in release path due to uncancelled work
CVE-2026-46006 7.8 HIGH drm/nouveau: fix u32 overflow in pushbuf reloc bounds check

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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