# CVE-2022-49841: linux: In the Linux kernel, the following vulnerability has been resolved:  serial: imx: Add missing .thaw_noirq hook  The f...

CVE-2022-49841 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49841, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49841
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  serial: imx: Add missing .thaw_noirq hook  The following warning is seen with non-console UART instance when system hibernates.  [   37.371969] ------------[ cut here ]------------ [   37.376599] uart3_root_clk already disabled [   37.380810] WARNING: CPU: 0 PID: 296 at drivers/clk/clk.c:952 clk_core_disable+0xa4/0xb0 ... [   37.506986] Call trace: [   37.509432]  clk_core_disable+0xa4/0xb0 [   37.513270]  clk_disable+0x34/0x50 [   37.516672]  imx_uart_thaw+0x38/0x5c [   37.520250]  platform_pm_thaw+0x30/0x6c [   37.524089]  dpm_run_callback.constprop.0+0x3c/0xd4 [   37.528972]  device_resume+0x7c/0x160 [   37.532633]  dpm_resume+0xe8/0x230 [   37.536036]  hibernation_snapshot+0x288/0x430 [   37.540397]  hibernate+0x10c/0x2e0 [   37.543798]  state_store+0xc4/0xd0 [   37.547203]  kobj_attr_store+0x1c/0x30 [   37.550953]  sysfs_kf_write+0x48/0x60 [   37.554619]  kernfs_fop_write_iter+0x118/0x1ac [   37.559063]  new_sync_write+0xe8/0x184 [   37.562812]  vfs_write+0x230/0x290 [   37.566214]  ksys_write+0x68/0xf4 [   37.569529]  __arm64_sys_write+0x20/0x2c [   37.573452]  invoke_syscall.constprop.0+0x50/0xf0 [   37.578156]  do_el0_svc+0x11c/0x150 [   37.581648]  el0_svc+0x30/0x140 [   37.584792]  el0t_64_sync_handler+0xe8/0xf0 [   37.588976]  el0t_64_sync+0x1a0/0x1a4 [   37.592639] ---[ end trace 56e22eec54676d75 ]---  On hibernating, pm core calls into related hooks in sequence like:      .freeze     .freeze_noirq     .thaw_noirq     .thaw  With .thaw_noirq hook being absent, the clock will be disabled in a unbalanced call which results the warning above.      imx_uart_freeze()         clk_prepare_enable()     imx_uart_suspend_noirq()         clk_disable()     imx_uart_thaw         clk_disable_unprepare()  Adding the missing .thaw_noirq hook as imx_uart_resume_noirq() will have the call sequence corrected as below and thus fix the warning.      imx_uart_freeze()         clk_prepare_enable()     imx_uart_suspend_noirq()         clk_disable()     imx_uart_resume_noirq()         clk_enable()     imx_uart_thaw         clk_disable_unprepare()

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.10-1 | [DEBIAN-CVE-2022-49841](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49841.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.10-1 | [DEBIAN-CVE-2022-49841](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49841.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.10-1 | [DEBIAN-CVE-2022-49841](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49841.md) | May 1, 2025 |

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