CVE-2023-53232

/// Technical description

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

mt76: mt7921: fix kernel panic by accessing unallocated eeprom.data

The MT7921 driver no longer uses eeprom.data, but the relevant code has not

been removed completely since

commit 16d98b548365 ("mt76: mt7921: rely on mcu_get_nic_capability").

This could result in potential invalid memory access.

To fix the kernel panic issue in mt7921, it is necessary to avoid accessing

unallocated eeprom.data which can lead to invalid memory access.

Furthermore, it is possible to entirely eliminate the

mt7921_mcu_parse_eeprom function and solely depend on

mt7921_mcu_parse_response to divide the RxD header.

[2.702735] BUG: kernel NULL pointer dereference, address: 0000000000000550

[2.702740] #PF: supervisor write access in kernel mode

[2.702741] #PF: error_code(0x0002) - not-present page

[2.702743] PGD 0 P4D 0

[2.702747] Oops: 0002 [#1] PREEMPT SMP NOPTI

[2.702755] RIP: 0010:mt7921_mcu_parse_response+0x147/0x170 [mt7921_common]

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/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References