What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-06-19
• Weakness: CWE-787

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 ]

Affected products

• Linux kernel: from 2.6.34 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 — fixed in 5.15.209, 6.1.175, 6.12.86, 6.18.27, 6.6.140, 7.0.4

How to fix

Upgrade to a fixed version: Linux kernel 5.15.209, 6.1.175, 6.12.86, 6.18.27. Check the vendor advisory for mitigations.

References

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

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