CVE-2022-49841
serial: imx: Add missing .thaw_noirq hook
- Published
- Updated
- Reserved
- Assigned by
- Linux
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()
Timeline
ID reserved
By Linux
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 – < e401312ca6e180ee1bd65f6a766e99dd40aa95e7
- affected 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 – < 476b09e07bd519ec7ba5941a6a6f9a02256dbb21
- affected 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 – < 0a3160f4ffc70ee4bfa1521f698dace06e6091fd
- affected 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 – < ae22294e213a402a70fa1731538367d1b758ffe7
- affected 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 – < e3f9d87d6f0732827c443bd1474df21c2fad704b
- affected 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 – < 4561d8008a467cb05ac632a215391d6b787f40aa
- affected 4.16
- unaffected < 4.16
- unaffected 4.19.267 – ≤ 4.19.*
- unaffected 5.4.225 – ≤ 5.4.*
- unaffected 5.10.156 – ≤ 5.10.*
- unaffected 5.15.80 – ≤ 5.15.*
- unaffected 6.0.10 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (6)
- https://git.kernel.org/stable/c/e401312ca6e180ee1bd65f6a766e99dd40aa95e7 (opens in a new tab)
- https://git.kernel.org/stable/c/476b09e07bd519ec7ba5941a6a6f9a02256dbb21 (opens in a new tab)
- https://git.kernel.org/stable/c/0a3160f4ffc70ee4bfa1521f698dace06e6091fd (opens in a new tab)
- https://git.kernel.org/stable/c/ae22294e213a402a70fa1731538367d1b758ffe7 (opens in a new tab)
- https://git.kernel.org/stable/c/e3f9d87d6f0732827c443bd1474df21c2fad704b (opens in a new tab)
- https://git.kernel.org/stable/c/4561d8008a467cb05ac632a215391d6b787f40aa (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49841)Record last updated .