CVE-2022-50575

xen/privcmd: Fix a possible warning in privcmd_ioctl_mmap_resource()

State: Published
Severity: Not scored
Published: Oct 22, 2025
Updated: May 11, 2026
Reserved: Oct 22, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

xen/privcmd: Fix a possible warning in privcmd_ioctl_mmap_resource()

As 'kdata.num' is user-controlled data, if user tries to allocate memory larger than(>=) MAX_ORDER, then kcalloc() will fail, it creates a stack trace and messes up dmesg with a warning.

Call trace: -> privcmd_ioctl --> privcmd_ioctl_mmap_resource

Add __GFP_NOWARN in order to avoid too large allocation warning. This is detected by static analysis using smatch.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	3ad0876554cafa368f574d4d408468510543e9ff to before 5d68ae32d132ea2af73bc223fd64c46f85302a8bAffected 3ad0876554cafa368f574d4d408468510543e9ff to before 4f983ee5e5de924d93a7bbb4e6f68f38c6256cd5Affected 3ad0876554cafa368f574d4d408468510543e9ff to before 46026bb057c35f5bb111bf95e00cd8366d2e34d4Affected 3ad0876554cafa368f574d4d408468510543e9ff to before 0bf874183b32eae2cc20e3c5be38ec3d33e7e564Affected 3ad0876554cafa368f574d4d408468510543e9ff to before e0c5f1058ed96f2b7487560c4c4cbd768d13d065Affected 3ad0876554cafa368f574d4d408468510543e9ff to before 4da411086f5ab32f811a89ef804980ec106ebb65Affected 3ad0876554cafa368f574d4d408468510543e9ff to before 8b997b2bb2c53b76a6db6c195930e9ab8e4b0c79Affected
LinuxLinux	4.18Affected before 4.18Not affected 4.19.270 through 4.19.Not affected 5.4.229 through 5.4.Not affected 5.10.163 through 5.10.Not affected 5.15.86 through 5.15.Not affected 6.0.16 through 6.0.Not affected 6.1.2 through 6.1.Not affected 6.2 and laterNot affected

Product

Versions

LinuxLinux

3ad0876554cafa368f574d4d408468510543e9ff to before 5d68ae32d132ea2af73bc223fd64c46f85302a8bAffected
3ad0876554cafa368f574d4d408468510543e9ff to before 4f983ee5e5de924d93a7bbb4e6f68f38c6256cd5Affected
3ad0876554cafa368f574d4d408468510543e9ff to before 46026bb057c35f5bb111bf95e00cd8366d2e34d4Affected
3ad0876554cafa368f574d4d408468510543e9ff to before 0bf874183b32eae2cc20e3c5be38ec3d33e7e564Affected
3ad0876554cafa368f574d4d408468510543e9ff to before e0c5f1058ed96f2b7487560c4c4cbd768d13d065Affected
3ad0876554cafa368f574d4d408468510543e9ff to before 4da411086f5ab32f811a89ef804980ec106ebb65Affected
3ad0876554cafa368f574d4d408468510543e9ff to before 8b997b2bb2c53b76a6db6c195930e9ab8e4b0c79Affected

LinuxLinux

4.18Affected
before 4.18Not affected
4.19.270 through 4.19.*Not affected
5.4.229 through 5.4.*Not affected
5.10.163 through 5.10.*Not affected
5.15.86 through 5.15.*Not affected
6.0.16 through 6.0.*Not affected
6.1.2 through 6.1.*Not affected
6.2 and laterNot affected

References

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