CVE-2026-46006— drm/nouveau: fix u32 overflow in pushbuf reloc bounds check
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | a1606a9596e54da90ad6209071b357a4c1b0fa82< 573a1104bd36e49c067a9dc62e7c476d5ee7e92a | affected |
a1606a9596e54da90ad6209071b357a4c1b0fa82< 45a45184b9c0b0b26ead06e370cda2073616a7cc | affected | ||
a1606a9596e54da90ad6209071b357a4c1b0fa82< fa297e919d1680c38ab268ff952b1698dac987f6 | affected | ||
a1606a9596e54da90ad6209071b357a4c1b0fa82< d749a9a0ee4014681487e7ae549901aa8c176637 | affected | ||
a1606a9596e54da90ad6209071b357a4c1b0fa82< 332884f5eb79dd60a7162b079d09d39208567a31 | affected | ||
a1606a9596e54da90ad6209071b357a4c1b0fa82< e441d5c23ec644c8d27593db3b8928e8933512a9 | affected | ||
a1606a9596e54da90ad6209071b357a4c1b0fa82< 2fc87d37be1b730a149b035f9375fdb8cc5333a5 | affected | ||
2.6.34 | affected | ||
| … +8 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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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
II. Public POCs for CVE-2026-46006
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-46006 (7)
Same Patch Batch · Linux · 2026-05-27 · 276 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-2026-45843 | 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-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-2026-45861 | 7.8 HIGH | gfs2: Fix slab-use-after-free in qd_put |
| CVE-2026-45931 | 7.8 HIGH | accel/amdxdna: Hold mm structure across iommu_sva_unbind_device() |
| CVE-2026-45929 | 7.8 HIGH | ovpn: fix possible use-after-free in ovpn_net_xmit |
| CVE-2026-45852 | 7.8 HIGH | RDMA/rxe: Fix double free in rxe_srq_from_init |
| CVE-2026-45878 | 7.8 HIGH | drm/amdkfd: Fix watch_id bounds checking in debug address watch v2 |
| CVE-2026-45970 | 7.8 HIGH | bonding: alb: fix UAF in rlb_arp_recv during bond up/down |
| CVE-2026-46036 | 7.8 HIGH | vfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex |
| CVE-2026-46053 | 7.8 HIGH | net: rds: fix MR cleanup on copy error |
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-2026-46006
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