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CVE-2026-45956— drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()

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exynos-drm驱动中vidi_connection_ioctl()函数错误地使用drm_dev->dev的driver_data进行上下文查找，可能导致空指针取消引用、越界错误或释放后重用。

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322< 2987642c5213508c6c9e718324c0d5289a92c474 affected
cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322< 65d1213baffa363f2eb1117b1dc7acc573b890f8 affected
cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322< 875fa28690e93ed5296c31d3344556c6bb867234 affected
cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322< 21ca24ba51a2c28bcc4df9d7e5a40b0eb66ab76d affected
cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322< b5fc86d753dd4c281a943b92f0eef02d31af03d7 affected
cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322< a540f767642f75240a6c35f6a65b69e44cfcea9d affected
cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322< d3968a0d85b211e197f2f4f06268a7031079e0d0 affected
4.3 affected
… +8 more rows
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I. Basic Information for CVE-2026-45956

Vulnerability Information
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Vulnerability Title
drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl() vidi_connection_ioctl() retrieves the driver_data from drm_dev->dev to obtain a struct vidi_context pointer. However, drm_dev->dev is the exynos-drm master device, and the driver_data contained therein is not the vidi component device, but a completely different device. This can lead to various bugs, ranging from null pointer dereferences and garbage value accesses to, in unlucky cases, out-of-bounds errors, use-after-free errors, and more. To resolve this issue, we need to store/delete the vidi device pointer in exynos_drm_private->vidi_dev during bind/unbind, and then read this exynos_drm_private->vidi_dev within ioctl() to obtain the correct struct vidi_context pointer.
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exynos-drm驱动中vidi_connection_ioctl()函数错误地使用drm_dev->dev的driver_data进行上下文查找，可能导致空指针取消引用、越界错误或释放后重用。
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 cf67cc9a29ac19c98bc4fa0e6d14b0c1f592d322 ~ 2987642c5213508c6c9e718324c0d5289a92c474 -
Linux Linux 4.3 -

II. Public POCs for CVE-2026-45956

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III. Intelligence Information for CVE-2026-45956

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Patches & Fixes for CVE-2026-45956 (6)

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-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
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-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
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-2026-46010 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-2026-45931 7.8 HIGH accel/amdxdna: Hold mm structure across iommu_sva_unbind_device()
CVE-2026-45935 7.8 HIGH fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
CVE-2026-45984 7.8 HIGH gfs2: Fix use-after-free in iomap inline data write path
CVE-2026-45933 7.8 HIGH bpf: Preserve id of register in sync_linked_regs()
CVE-2026-46006 7.8 HIGH drm/nouveau: fix u32 overflow in pushbuf reloc bounds check
CVE-2026-45862 7.8 HIGH iommu/vt-d: Flush cache for PASID table before using it
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-2026-45956

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