Linux Kernel up to 5.4.117/5.10.35/5.11.19/5.12.2 amdkfd get_num_sdma_queues out-of-bounds

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 5.4.117/5.10.35/5.11.19/5.12.2. This vulnerability affects the function get_num_sdma_queues of the component amdkfd. Performing a manipulation results in out-of-bounds. This vulnerability is known as CVE-2021-4460. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 5.4.117/5.10.35/5.11.19/5.12.2. This affects the function get_num_sdma_queues of the component amdkfd. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix UBSAN shift-out-of-bounds warning If get_num_sdma_queues or get_num_xgmi_sdma_queues is 0, we end up doing a shift operation where the number of bits shifted equals number of bits in the operand. This behaviour is undefined. Set num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the count is >= number of bits in the operand. Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1472

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2021-4460 since 10/01/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 269646 (Linux Distros Unpatched Vulnerability : CVE-2021-4460), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.118, 5.10.36, 5.11.20 or 5.12.3 eliminates this vulnerability. Applying the patch 0c0356ef2498c1a250fe3846f30293f828737309/1874b0ef1426b873de94c61861e38f29a8df714c/3fdc5182700910a685d23df57d65166e8556a266/9069b1b542de8f3bbffef868aff41521b21485cf/50e2fc36e72d4ad672032ebf646cecb48656efe0 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (269646) and CERT Bund (WID-SEC-2025-2187). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• Open Source Linux Kernel
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.4.117
• 5.10.0
• 5.10.1
• 5.10.2
• 5.10.3
• 5.10.4
• 5.10.5
• 5.10.6
• 5.10.7
• 5.10.8
• 5.10.9
• 5.10.10
• 5.10.11
• 5.10.12
• 5.10.13
• 5.10.14
• 5.10.15
• 5.10.16
• 5.10.17
• 5.10.18
• 5.10.19
• 5.10.20
• 5.10.21
• 5.10.22
• 5.10.23
• 5.10.24
• 5.10.25
• 5.10.26
• 5.10.27
• 5.10.28
• 5.10.29
• 5.10.30
• 5.10.31
• 5.10.32
• 5.10.33
• 5.10.34
• 5.10.35
• 5.11.0
• 5.11.1
• 5.11.2
• 5.11.3
• 5.11.4
• 5.11.5
• 5.11.6
• 5.11.7
• 5.11.8
• 5.11.9
• 5.11.10
• 5.11.11
• 5.11.12
• 5.11.13
• 5.11.14
• 5.11.15
• 5.11.16
• 5.11.17
• 5.11.18
• 5.11.19
• 5.12.0
• 5.12.1
• 5.12.2

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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CVSSv4info

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Exploitinginfo

Threat Intelligenceinfo

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Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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