Linux Kernel up to 5.12.3 mt76 mt76_connac_mcu_uni_add_dev state issue

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 5.12.3. Affected is the function mt76_connac_mcu_uni_add_dev of the component mt76. This manipulation causes state issue. This vulnerability is tracked as CVE-2021-47029. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.12.3 (Operating System). It has been declared as problematic. Affected by this vulnerability is the function mt76_connac_mcu_uni_add_dev of the component mt76. The manipulation with an unknown input leads to a state issue vulnerability. The CWE definition for the vulnerability is CWE-371. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: mt76: connac: fix kernel warning adding monitor interface Fix the following kernel warning adding a monitor interface in mt76_connac_mcu_uni_add_dev routine. [ 507.984882] ------------[ cut here ]------------ [ 507.989515] WARNING: CPU: 1 PID: 3017 at mt76_connac_mcu_uni_add_dev+0x178/0x190 [mt76_connac_lib] [ 508.059379] CPU: 1 PID: 3017 Comm: ifconfig Not tainted 5.4.98 #0 [ 508.065461] Hardware name: MT7622_MT7531 RFB (DT) [ 508.070156] pstate: 80000005 (Nzcv daif -PAN -UAO) [ 508.074939] pc : mt76_connac_mcu_uni_add_dev+0x178/0x190 [mt76_connac_lib] [ 508.081806] lr : mt7921_eeprom_init+0x1288/0x1cb8 [mt7921e] [ 508.087367] sp : ffffffc013a33930 [ 508.090671] x29: ffffffc013a33930 x28: ffffff801e628ac0 [ 508.095973] x27: ffffff801c7f1200 x26: ffffff801c7eb008 [ 508.101275] x25: ffffff801c7eaef0 x24: ffffff801d025610 [ 508.106577] x23: ffffff801d022990 x22: ffffff801d024de8 [ 508.111879] x21: ffffff801d0226a0 x20: ffffff801c7eaee8 [ 508.117181] x19: ffffff801d0226a0 x18: 000000005d00b000 [ 508.122482] x17: 00000000ffffffff x16: 0000000000000000 [ 508.127785] x15: 0000000000000080 x14: ffffff801d704000 [ 508.133087] x13: 0000000000000040 x12: 0000000000000002 [ 508.138389] x11: 000000000000000c x10: 0000000000000000 [ 508.143691] x9 : 0000000000000020 x8 : 0000000000000001 [ 508.148992] x7 : 0000000000000000 x6 : 0000000000000000 [ 508.154294] x5 : ffffff801c7eaee8 x4 : 0000000000000006 [ 508.159596] x3 : 0000000000000001 x2 : 0000000000000000 [ 508.164898] x1 : ffffff801c7eac08 x0 : ffffff801d0226a0 [ 508.170200] Call trace: [ 508.172640] mt76_connac_mcu_uni_add_dev+0x178/0x190 [mt76_connac_lib] [ 508.179159] mt7921_eeprom_init+0x1288/0x1cb8 [mt7921e] [ 508.184394] drv_add_interface+0x34/0x88 [mac80211] [ 508.189271] ieee80211_add_virtual_monitor+0xe0/0xb48 [mac80211] [ 508.195277] ieee80211_do_open+0x86c/0x918 [mac80211] [ 508.200328] ieee80211_do_open+0x900/0x918 [mac80211] [ 508.205372] __dev_open+0xcc/0x150 [ 508.208763] __dev_change_flags+0x134/0x198 [ 508.212937] dev_change_flags+0x20/0x60 [ 508.216764] devinet_ioctl+0x3e8/0x748 [ 508.220503] inet_ioctl+0x1e4/0x350 [ 508.223983] sock_do_ioctl+0x48/0x2a0 [ 508.227635] sock_ioctl+0x310/0x4f8 [ 508.231116] do_vfs_ioctl+0xa4/0xac0 [ 508.234681] ksys_ioctl+0x44/0x90 [ 508.237985] __arm64_sys_ioctl+0x1c/0x48 [ 508.241901] el0_svc_common.constprop.1+0x7c/0x100 [ 508.246681] el0_svc_handler+0x18/0x20 [ 508.250421] el0_svc+0x8/0x1c8 [ 508.253465] ---[ end trace c7b90fee13d72c39 ]--- [ 508.261278] ------------[ cut here ]------------

The weakness was disclosed 02/28/2024. It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2021-47029 since 02/27/2024. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.12.4 or 5.13 eliminates this vulnerability. Applying the patch 2554b9cb4b5e/c996f0346e40 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

• 5.12.0
• 5.12.1
• 5.12.2
• 5.12.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

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CPE 2.2info

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