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CVE-2024-50080

ublk: don't allow user copy for unprivileged device

MEDIUM
5.5
CVSS Score
Published: October 29, 2024 at 12:50 AM UTC
Updated: June 17, 2026 at 08:03 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.5 ≤ v < 6.11.56.5 ≤ v < 6.126.5 ≤ v < 6.6.586.7 ≤ v < 6.11.51172d5b8beca6b899deb9f7f2850e7e47ec161986.12 rc16.12 rc26.12 rc3
Vendor states this is fixed in 42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6 (fixed)
Vendor states this is fixed in 6414ab5c9c9c068eca6dc4fd3a036bc4b83164dc (fixed)
Vendor states this is fixed in 8f3d5686a2409877c5e8e2540774d24ed2b4a4ce (fixed)
Vendor states this is fixed in 6.11.5 (unaffected)
Vendor states this is fixed in 6.12 (unaffected)
Vendor states this is fixed in 6.5 (unaffected)
Vendor states this is fixed in 6.6.58 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6414ab5c9c9c068eca6dc4fd3a036bc4b83164dc
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8f3d5686a2409877c5e8e2540774d24ed2b4a4ce

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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