{"id":"CVE-2022-49841","title":"serial: imx: Add missing .thaw_noirq hook","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: imx: Add missing .thaw_noirq hook\n\nThe following warning is seen with non-console UART instance when\nsystem hibernates.\n\n[   37.371969] ------------[ cut here ]…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < e401312ca6e180ee1bd65f6a766e99dd40aa95e7","Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < 476b09e07bd519ec7ba5941a6a6f9a02256dbb21","Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < 0a3160f4ffc70ee4bfa1521f698dace06e6091fd","Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < ae22294e213a402a70fa1731538367d1b758ffe7","Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < e3f9d87d6f0732827c443bd1474df21c2fad704b","Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < 4561d8008a467cb05ac632a215391d6b787f40aa","Linux 4.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:50:44.550163Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:00:09.625Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49841","references":[{"url":"https://git.kernel.org/stable/c/e401312ca6e180ee1bd65f6a766e99dd40aa95e7"},{"url":"https://git.kernel.org/stable/c/476b09e07bd519ec7ba5941a6a6f9a02256dbb21"},{"url":"https://git.kernel.org/stable/c/0a3160f4ffc70ee4bfa1521f698dace06e6091fd"},{"url":"https://git.kernel.org/stable/c/ae22294e213a402a70fa1731538367d1b758ffe7"},{"url":"https://git.kernel.org/stable/c/e3f9d87d6f0732827c443bd1474df21c2fad704b"},{"url":"https://git.kernel.org/stable/c/4561d8008a467cb05ac632a215391d6b787f40aa"}],"tags":["cve.org"],"epss":0.00202,"epssPercentile":0.10259,"ingestedAt":"2026-11-05T22:38:31.619Z","slug":"CVE-2022-49841","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nserial: imx: Add missing .thaw_noirq hook\n\nThe following warning is seen with non-console UART instance when\nsystem hibernates.\n\n[   37.371969] ------------[ cut here ]------------\n[   37.376599] uart3_root_clk already disabled\n[   37.380810] WARNING: CPU: 0 PID: 296 at drivers/clk/clk.c:952 clk_core_disable+0xa4/0xb0\n...\n[   37.506986] Call trace:\n[   37.509432]  clk_core_disable+0xa4/0xb0\n[   37.513270]  clk_disable+0x34/0x50\n[   37.516672]  imx_uart_thaw+0x38/0x5c\n[   37.520250]  platform_pm_thaw+0x30/0x6c\n[   37.524089]  dpm_run_callback.constprop.0+0x3c/0xd4\n[   37.528972]  device_resume+0x7c/0x160\n[   37.532633]  dpm_resume+0xe8/0x230\n[   37.536036]  hibernation_snapshot+0x288/0x430\n[   37.540397]  hibernate+0x10c/0x2e0\n[   37.543798]  state_store+0xc4/0xd0\n[   37.547203]  kobj_attr_store+0x1c/0x30\n[   37.550953]  sysfs_kf_write+0x48/0x60\n[   37.554619]  kernfs_fop_write_iter+0x118/0x1ac\n[   37.559063]  new_sync_write+0xe8/0x184\n[   37.562812]  vfs_write+0x230/0x290\n[   37.566214]  ksys_write+0x68/0xf4\n[   37.569529]  __arm64_sys_write+0x20/0x2c\n[   37.573452]  invoke_syscall.constprop.0+0x50/0xf0\n[   37.578156]  do_el0_svc+0x11c/0x150\n[   37.581648]  el0_svc+0x30/0x140\n[   37.584792]  el0t_64_sync_handler+0xe8/0xf0\n[   37.588976]  el0t_64_sync+0x1a0/0x1a4\n[   37.592639] ---[ end trace 56e22eec54676d75 ]---\n\nOn hibernating, pm core calls into related hooks in sequence like:\n\n    .freeze\n    .freeze_noirq\n    .thaw_noirq\n    .thaw\n\nWith .thaw_noirq hook being absent, the clock will be disabled in a\nunbalanced call which results the warning above.\n\n    imx_uart_freeze()\n        clk_prepare_enable()\n    imx_uart_suspend_noirq()\n        clk_disable()\n    imx_uart_thaw\n        clk_disable_unprepare()\n\nAdding the missing .thaw_noirq hook as imx_uart_resume_noirq() will have\nthe call sequence corrected as below and thus fix the warning.\n\n    imx_uart_freeze()\n        clk_prepare_enable()\n    imx_uart_suspend_noirq()\n        clk_disable()\n    imx_uart_resume_noirq()\n        clk_enable()\n    imx_uart_thaw\n        clk_disable_unprepare()\n\n## Affected\n\n- `Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < e401312ca6e180ee1bd65f6a766e99dd40aa95e7`\n- `Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < 476b09e07bd519ec7ba5941a6a6f9a02256dbb21`\n- `Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < 0a3160f4ffc70ee4bfa1521f698dace06e6091fd`\n- `Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < ae22294e213a402a70fa1731538367d1b758ffe7`\n- `Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < e3f9d87d6f0732827c443bd1474df21c2fad704b`\n- `Linux >= 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 < 4561d8008a467cb05ac632a215391d6b787f40aa`\n- `Linux 4.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}