CVE-2024-27008: drm: nv04: Fix out of bounds access

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-01 · updated 2026-06-17
Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: drm: nv04: Fix out of bounds access When Output Resource (dcb->or) value is assigned in fabricate_dcb_output(), there may be out of bounds access to dac_users array in case dcb->or is zero because ffs(dcb->or) is used as index there. The 'or' argument of fabricate_dcb_output() must be interpreted as a number of bit to set, not value. Utilize macros from 'enum nouveau_or' in calls instead of hardcoding. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Affected products

Debian Linux: 10.0
Fedoraproject Fedora: 38, 39, 40
Linux kernel: from 2.6.38 before 4.19.313; from 4.20 before 5.4.275; from 5.5 before 5.10.216; from 5.11 before 5.15.157; from 5.16 before 6.1.88; from 6.2 before 6.6.29 — fixed in 4.19.313, 5.10.216, 5.15.157, 5.4.275, 6.1.88, 6.6.29

How to fix

Upgrade to a fixed version: Linux kernel 4.19.313, 5.10.216, 5.15.157, 5.4.275. Check the vendor advisory for mitigations.

References

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