What’s Vulnerable › Vulnerabilities

CVE-2024-50080: ublk: don't allow user copy for unprivileged device

• 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: 2024-10-29 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: don't allow user copy for unprivileged device UBLK_F_USER_COPY requires userspace to call write() on ublk char device for filling request buffer, and unprivileged device can't be trusted. So don't allow user copy for unprivileged device.

Affected products

• Linux kernel: from 6.5 before 6.6.58; from 6.7 before 6.11.5; 6.12-rc1, 6.12-rc2, 6.12-rc3 — fixed in 6.11.5, 6.6.58

How to fix

Upgrade to a fixed version: Linux kernel 6.11.5, 6.6.58. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6
• https://git.kernel.org/stable/c/6414ab5c9c9c068eca6dc4fd3a036bc4b83164dc
• https://git.kernel.org/stable/c/8f3d5686a2409877c5e8e2540774d24ed2b4a4ce

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