Linux Kernel up to 5.10.100/5.15.23/5.16.9 phy-j721e-wiz.c _get_table_maxdiv out-of-bounds

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 5.10.100/5.15.23/5.16.9. This issue affects the function _get_table_maxdiv of the file phy-j721e-wiz.c. This manipulation causes out-of-bounds. This vulnerability is tracked as CVE-2022-48803. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.10.100/5.15.23/5.16.9. It has been declared as problematic. Affected by this vulnerability is the function _get_table_maxdiv of the file phy-j721e-wiz.c. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: phy: ti: Fix missing sentinel for clk_div_table _get_table_maxdiv() tries to access "clk_div_table" array out of bound defined in phy-j721e-wiz.c. Add a sentinel entry to prevent the following global-out-of-bounds error reported by enabling KASAN. [ 9.552392] BUG: KASAN: global-out-of-bounds in _get_maxdiv+0xc0/0x148 [ 9.558948] Read of size 4 at addr ffff8000095b25a4 by task kworker/u4:1/38 [ 9.565926] [ 9.567441] CPU: 1 PID: 38 Comm: kworker/u4:1 Not tainted 5.16.0-116492-gdaadb3bd0e8d-dirty #360 [ 9.576242] Hardware name: Texas Instruments J721e EVM (DT) [ 9.581832] Workqueue: events_unbound deferred_probe_work_func [ 9.587708] Call trace: [ 9.590174] dump_backtrace+0x20c/0x218 [ 9.594038] show_stack+0x18/0x68 [ 9.597375] dump_stack_lvl+0x9c/0xd8 [ 9.601062] print_address_description.constprop.0+0x78/0x334 [ 9.606830] kasan_report+0x1f0/0x260 [ 9.610517] __asan_load4+0x9c/0xd8 [ 9.614030] _get_maxdiv+0xc0/0x148 [ 9.617540] divider_determine_rate+0x88/0x488 [ 9.622005] divider_round_rate_parent+0xc8/0x124 [ 9.626729] wiz_clk_div_round_rate+0x54/0x68 [ 9.631113] clk_core_determine_round_nolock+0x124/0x158 [ 9.636448] clk_core_round_rate_nolock+0x68/0x138 [ 9.641260] clk_core_set_rate_nolock+0x268/0x3a8 [ 9.645987] clk_set_rate+0x50/0xa8 [ 9.649499] cdns_sierra_phy_init+0x88/0x248 [ 9.653794] phy_init+0x98/0x108 [ 9.657046] cdns_pcie_enable_phy+0xa0/0x170 [ 9.661340] cdns_pcie_init_phy+0x250/0x2b0 [ 9.665546] j721e_pcie_probe+0x4b8/0x798 [ 9.669579] platform_probe+0x8c/0x108 [ 9.673350] really_probe+0x114/0x630 [ 9.677037] __driver_probe_device+0x18c/0x220 [ 9.681505] driver_probe_device+0xac/0x150 [ 9.685712] __device_attach_driver+0xec/0x170 [ 9.690178] bus_for_each_drv+0xf0/0x158 [ 9.694124] __device_attach+0x184/0x210 [ 9.698070] device_initial_probe+0x14/0x20 [ 9.702277] bus_probe_device+0xec/0x100 [ 9.706223] deferred_probe_work_func+0x124/0x180 [ 9.710951] process_one_work+0x4b0/0xbc0 [ 9.714983] worker_thread+0x74/0x5d0 [ 9.718668] kthread+0x214/0x230 [ 9.721919] ret_from_fork+0x10/0x20 [ 9.725520] [ 9.727032] The buggy address belongs to the variable: [ 9.732183] clk_div_table+0x24/0x440

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-48803 since 07/16/2024. The exploitation appears to be difficult. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.10.101, 5.15.24 or 5.16.10 eliminates this vulnerability. Applying the patch 3c75d1017cb3/7a360e546ad9/5b0c9569135a/6d1e6bcb3166 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

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10.100
• 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
• 5.16.0
• 5.16.1
• 5.16.2
• 5.16.3
• 5.16.4
• 5.16.5
• 5.16.6
• 5.16.7
• 5.16.8
• 5.16.9

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

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