CVE-2024-50080: ublk: don't allow user copy for unprivileged device
First published: Tue Oct 29 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.5<6.6.58 | |
| Linux Kernel | >=6.7<6.11.5 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.22-1 6.12.25-1 |
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Reference Links
- https://git.kernel.org/stable/c/6414ab5c9c9c068eca6dc4fd3a036bc4b83164dc
- https://git.kernel.org/stable/c/8f3d5686a2409877c5e8e2540774d24ed2b4a4ce
- https://git.kernel.org/stable/c/42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50080
- https://nvd.nist.gov/vuln/detail/CVE-2024-50080
- https://launchpad.net/bugs/cve/CVE-2024-50080
- https://security-tracker.debian.org/tracker/CVE-2024-50080
- https://ubuntu.com/security/CVE-2024-50080
- https://git.kernel.org/linus/42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6
Frequently Asked Questions
What is the severity of CVE-2024-50080?
CVE-2024-50080 is considered a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2024-50080?
To fix CVE-2024-50080, update to the patched versions of the Linux kernel, such as 5.10.223-1, 6.1.123-1, or 6.12.12-1.
Which versions of the Linux kernel are affected by CVE-2024-50080?
CVE-2024-50080 affects several Linux kernel versions between 6.5 and 6.6.58, as well as 6.7 to 6.11.5 and the 6.12 release candidates.
What is UBLK_F_USER_COPY in relation to CVE-2024-50080?
UBLK_F_USER_COPY is a feature that should not allow unprivileged devices to make user copies, which is the basis of CVE-2024-50080.
Is CVE-2024-50080 related to user privilege escalation?
Yes, CVE-2024-50080 is related to user privilege escalation risks due to the handling of unprivileged devices in the Linux kernel.
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