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CVE-2026-46006— drm/nouveau: fix u32 overflow in pushbuf reloc bounds check

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nouveau驱动中pushbuf重定位边界检查时reloc_bo_offset为__u32类型导致整数溢出，可能绕过验证。

CVSS 7.8 · High EPSS 0.14% · P4

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux a1606a9596e54da90ad6209071b357a4c1b0fa82< 3429275684f4bad42876955301f3c5c814aae909 affected
a1606a9596e54da90ad6209071b357a4c1b0fa82< 573a1104bd36e49c067a9dc62e7c476d5ee7e92a affected
a1606a9596e54da90ad6209071b357a4c1b0fa82< 45a45184b9c0b0b26ead06e370cda2073616a7cc affected
a1606a9596e54da90ad6209071b357a4c1b0fa82< fa297e919d1680c38ab268ff952b1698dac987f6 affected
a1606a9596e54da90ad6209071b357a4c1b0fa82< d749a9a0ee4014681487e7ae549901aa8c176637 affected
a1606a9596e54da90ad6209071b357a4c1b0fa82< 332884f5eb79dd60a7162b079d09d39208567a31 affected
a1606a9596e54da90ad6209071b357a4c1b0fa82< e441d5c23ec644c8d27593db3b8928e8933512a9 affected
a1606a9596e54da90ad6209071b357a4c1b0fa82< 2fc87d37be1b730a149b035f9375fdb8cc5333a5 affected
… +10 more rows
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I. Basic Information for CVE-2026-46006

Vulnerability Information
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Vulnerability Title
drm/nouveau: fix u32 overflow in pushbuf reloc bounds check
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix u32 overflow in pushbuf reloc bounds check nouveau_gem_pushbuf_reloc_apply() validates each relocation with if (r->reloc_bo_offset + 4 > nvbo->bo.base.size) but reloc_bo_offset is __u32 (uapi/drm/nouveau_drm.h) and the integer literal 4 promotes to unsigned int, so the addition is performed in 32 bits and wraps before the comparison against the size_t bo size. Cast to u64 so the addition happens in 64-bit arithmetic. [ Add Fixes: tag. - Danilo ]
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nouveau驱动中pushbuf重定位边界检查时reloc_bo_offset为__u32类型导致整数溢出，可能绕过验证。
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 a1606a9596e54da90ad6209071b357a4c1b0fa82 ~ 3429275684f4bad42876955301f3c5c814aae909 -
Linux Linux 2.6.34 -

II. Public POCs for CVE-2026-46006

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III. Intelligence Information for CVE-2026-46006

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Patches & Fixes for CVE-2026-46006 (6)

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

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-2026-45988 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-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
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-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
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-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-46036 7.8 HIGH vfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-45933 7.8 HIGH bpf: Preserve id of register in sync_linked_regs()
CVE-2026-46065 7.8 HIGH fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-45894 7.8 HIGH iommu/vt-d: Clear Present bit before tearing down PASID entry
CVE-2026-46058 7.8 HIGH media: amphion: Fix race between m2m job_abort and device_run

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-2026-46006

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