Linux Kernel up to 5.4.189/5.10.111/5.15.34/5.17.3 tse_pcs_fix_mac_speed null pointer dereference

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 5.4.189/5.10.111/5.15.34/5.17.3. This impacts the function tse_pcs_fix_mac_speed. The manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2022-49061. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.4.189/5.10.111/5.15.34/5.17.3 and classified as critical. This issue affects the function tse_pcs_fix_mac_speed. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link When using a fixed-link, the altr_tse_pcs driver crashes due to null-pointer dereference as no phy_device is provided to tse_pcs_fix_mac_speed function. Fix this by adding a check for phy_dev before calling the tse_pcs_fix_mac_speed() function. Also clean up the tse_pcs_fix_mac_speed function a bit. There is no need to check for splitter_base and sgmii_adapter_base because the driver will fail if these 2 variables are not derived from the device tree.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2022-49061 since 02/26/2025. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.4.190, 5.10.112, 5.15.35 or 5.17.4 eliminates this vulnerability. Applying the patch 7e59fdf9547c4f948d1d917ec7ffa5fb5ac53bdb/08d5e3e954537931c8da7428034808d202e98299/62a48383ebe2e159fd68425dd3e16d4c6bd6599a/6c020f05253df04c3480b586fe188a3582740049/a6aaa00324240967272b451bfa772547bd576ee6 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.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.4.189
• 5.10.111
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.17.0
• 5.17.1
• 5.17.2
• 5.17.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

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CPE 2.2info

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