# CVE-2022-50828: linux: In the Linux kernel, the following vulnerability has been resolved:  clk: zynqmp: Fix stack-out-of-bounds in strncpy`...

CVE-2022-50828 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50828, released December 30, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50828
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 30, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  clk: zynqmp: Fix stack-out-of-bounds in strncpy`  "BUG: KASAN: stack-out-of-bounds in strncpy+0x30/0x68"  Linux-ATF interface is using 16 bytes of SMC payload. In case clock name is longer than 15 bytes, string terminated NULL character will not be received by Linux. Add explicit NULL character at last byte to fix issues when clock name is longer.  This fixes below bug reported by KASAN:   ==================================================================  BUG: KASAN: stack-out-of-bounds in strncpy+0x30/0x68  Read of size 1 at addr ffff0008c89a7410 by task swapper/0/1   CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.4.0-00396-g81ef9e7-dirty #3  Hardware name: Xilinx Versal vck190 Eval board revA (QSPI) (DT)  Call trace:   dump_backtrace+0x0/0x1e8   show_stack+0x14/0x20   dump_stack+0xd4/0x108   print_address_description.isra.0+0xbc/0x37c   __kasan_report+0x144/0x198   kasan_report+0xc/0x18   __asan_load1+0x5c/0x68   strncpy+0x30/0x68   zynqmp_clock_probe+0x238/0x7b8   platform_drv_probe+0x6c/0xc8   really_probe+0x14c/0x418   driver_probe_device+0x74/0x130   __device_attach_driver+0xc4/0xe8   bus_for_each_drv+0xec/0x150   __device_attach+0x160/0x1d8   device_initial_probe+0x10/0x18   bus_probe_device+0xe0/0xf0   device_add+0x528/0x950   of_device_add+0x5c/0x80   of_platform_device_create_pdata+0x120/0x168   of_platform_bus_create+0x244/0x4e0   of_platform_populate+0x50/0xe8   zynqmp_firmware_probe+0x370/0x3a8   platform_drv_probe+0x6c/0xc8   really_probe+0x14c/0x418   driver_probe_device+0x74/0x130   device_driver_attach+0x94/0xa0   __driver_attach+0x70/0x108   bus_for_each_dev+0xe4/0x158   driver_attach+0x30/0x40   bus_add_driver+0x21c/0x2b8   driver_register+0xbc/0x1d0   __platform_driver_register+0x7c/0x88   zynqmp_firmware_driver_init+0x1c/0x24   do_one_initcall+0xa4/0x234   kernel_init_freeable+0x1b0/0x24c   kernel_init+0x10/0x110   ret_from_fork+0x10/0x18   The buggy address belongs to the page:  page:ffff0008f9be1c88 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0  raw: 0008d00000000000 ffff0008f9be1c90 ffff0008f9be1c90 0000000000000000  raw: 0000000000000000 0000000000000000 00000000ffffffff  page dumped because: kasan: bad access detected   addr ffff0008c89a7410 is located in stack of task swapper/0/1 at offset 112 in frame:   zynqmp_clock_probe+0x0/0x7b8   this frame has 3 objects:   [32, 44) 'response'   [64, 80) 'ret_payload'   [96, 112) 'name'   Memory state around the buggy address:   ffff0008c89a7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ffff0008c89a7380: 00 00 00 00 f1 f1 f1 f1 00 04 f2 f2 00 00 f2 f2  >ffff0008c89a7400: 00 00 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00                           ^   ffff0008c89a7480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ffff0008c89a7500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ==================================================================

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.3-1 | [DEBIAN-CVE-2022-50828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50828.md) | Dec 30, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.3-1 | [DEBIAN-CVE-2022-50828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50828.md) | Dec 30, 2025 |
| Linux | linux Debian 14 | 6.0.3-1 | [DEBIAN-CVE-2022-50828](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50828.md) | Dec 30, 2025 |

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