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CVE-2026-64049: drm/msm/adreno: fix userspace-triggered crash on a2xx-a4xx

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-19 · updated 2026-09-02
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: drm/msm/adreno: fix userspace-triggered crash on a2xx-a4xx Before a5xx Adreno driver will not try fetching UBWC params (because those generations didn't support UBWC anyway), however it's still possible to query UBWC-related params from the userspace, triggering possible NULL pointer dereference. Check for UBWC config in adreno_get_param() and return sane defaults if there is none. Patchwork: https://patchwork.freedesktop.org/patch/717778/

Affected products

• Linux kernel: from 6.17 before 6.18.34; from 6.19 before 7.0.11; 7.1-rc1, 7.1-rc2, 7.1-rc3, 7.1-rc4 — fixed in 6.18.34, 7.0.11

How to fix

Upgrade to a fixed version: Linux kernel 6.18.34, 7.0.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/22fc33d9b67694b24e0deb3f08c622464338cecb
• https://git.kernel.org/stable/c/2b4abf879360ea00a9e2b46d2d15dcdbc0687eed
• https://git.kernel.org/stable/c/eea43d5ed45089705bc5d70971c39076962d5951

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