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Vulnerability record · CVE-2026-46006 · published 27 May 2026

CVE-2026-46006: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

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 ]

7.8 CVSS 3.1 High EPSS 0.18% · top 93.6% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
19 Jun 2026Last modified by NVD

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 ]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/2fc87d37be1b730a149b035f9375fdb8cc5333a5 Patch
https://git.kernel.org/stable/c/332884f5eb79dd60a7162b079d09d39208567a31 Patch
https://git.kernel.org/stable/c/3429275684f4bad42876955301f3c5c814aae909
https://git.kernel.org/stable/c/45a45184b9c0b0b26ead06e370cda2073616a7cc Patch
https://git.kernel.org/stable/c/573a1104bd36e49c067a9dc62e7c476d5ee7e92a Patch
https://git.kernel.org/stable/c/d749a9a0ee4014681487e7ae549901aa8c176637 Patch
https://git.kernel.org/stable/c/e441d5c23ec644c8d27593db3b8928e8933512a9 Patch
https://git.kernel.org/stable/c/fa297e919d1680c38ab268ff952b1698dac987f6 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-46006), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.