7.8

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

Modified
AliasesUBUNTU-CVE-2026-46006DEBIAN-CVE-2026-46006
Published 27-05-2026Last modified 05-08-2026

Vulnerability summary

CVE-2026-46006 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 46 · Related 46
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:21555-1SUSE-SU-2026:23066-1SUSE-SU-2026:23068-1SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Decrease -0.03 pp

From 0.18% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu159 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ a1606a9596e54da90ad6209071b357a4c1b0fa82, < 3429275684f4bad42876955301f3c5c814aae909 | ≥ a1606a9596e54da90ad6209071b357a4c1b0fa82, < 573a1104bd36e49c067a9dc62e7c476d5ee7e92a | ≥ a1606a9596e54da90ad6209071b357a4c1b0fa82, < 45a45184b9c0b0b26ead06e370cda2073616a7cc | ≥ a1606a9596e54da90ad6209071b357a4c1b0fa82, < fa297e919d1680c38ab268ff952b1698dac987f6 | ≥ a1606a9596e54da90ad6209071b357a4c1b0fa82, < d749a9a0ee4014681487e7ae549901aa8c176637 | ≥ a1606a9596e54da90ad6209071b357a4c1b0fa82, < 332884f5eb79dd60a7162b079d09d39208567a31 | ≥ a1606a9596e54da90ad6209071b357a4c1b0fa82, < e441d5c23ec644c8d27593db3b8928e8933512a9 | ≥ a1606a9596e54da90ad6209071b357a4c1b0fa82, < 2fc87d37be1b730a149b035f9375fdb8cc5333a5 | 2.6.34
  • linux_kernel≥ 2.6.34, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.86 | ≥ 6.13, < 6.18.27 | ≥ 6.19, < 7.0.4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1

3 vendors · 162 products

References

46 links
Show all 46 references