{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"d9cb6fabc90102f9e61fe35bd0160db88f4f53b4","status":"affected","version":"bedb404e91bb2908d9921fc736a518a9d89525fc","versionType":"git"},{"lessThan":"190ce5cdc55d1b66ea582ac2be6fd5a72e3cc486","status":"affected","version":"bedb404e91bb2908d9921fc736a518a9d89525fc","versionType":"git"},{"lessThan":"5df66302f03f87ae8953785a882d78e911f00c55","status":"affected","version":"bedb404e91bb2908d9921fc736a518a9d89525fc","versionType":"git"},{"lessThan":"f9b11229b79c0fb2100b5bb4628a101b1d37fbf6","status":"affected","version":"bedb404e91bb2908d9921fc736a518a9d89525fc","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"5.7"},{"lessThan":"5.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.132","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.56","versionType":"semver"},{"lessThanOrEqual":"5.18.*","status":"unaffected","version":"5.18.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"5.19","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2022-49613","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: Fix PM usage_count for console handover\n\nWhen console is enabled, univ8250_console_setup() calls\nserial8250_console_setup() before .dev is set to uart_port. Therefore,\nit will not call pm_runtime_get_sync(). Later, when the actual driver\nis going to take over univ8250_console_exit() is called. As .dev is\nalready set, serial8250_console_exit() makes pm_runtime_put_sync() call\nwith usage count being zero triggering PM usage count warning\n(extra debug for univ8250_console_setup(), univ8250_console_exit(), and\nserial8250_register_ports()):\n\n[    0.068987] univ8250_console_setup ttyS0 nodev\n[    0.499670] printk: console [ttyS0] enabled\n[    0.717955] printk: console [ttyS0] printing thread started\n[    1.960163] serial8250_register_ports assigned dev for ttyS0\n[    1.976830] printk: console [ttyS0] disabled\n[    1.976888] printk: console [ttyS0] printing thread stopped\n[    1.977073] univ8250_console_exit ttyS0 usage:0\n[    1.977075] serial8250 serial8250: Runtime PM usage count underflow!\n[    1.977429] dw-apb-uart.6: ttyS0 at MMIO 0x4010006000 (irq = 33, base_baud = 115200) is a 16550A\n[    1.977812] univ8250_console_setup ttyS0 usage:2\n[    1.978167] printk: console [ttyS0] printing thread started\n[    1.978203] printk: console [ttyS0] enabled\n\nTo fix the issue, call pm_runtime_get_sync() in\nserial8250_register_ports() as soon as .dev is set for an uart_port\nif it has console enabled.\n\nThis problem became apparent only recently because 82586a721595 (\"PM:\nruntime: Avoid device usage count underflows\") added the warning\nprintout. I confirmed this problem also occurs with v5.18 (w/o the\nwarning printout, obviously).","epss":{"date":"2026-11-05","percentile":0.17963,"score":0.00261},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793908181012,"publishedAt":1740536614739,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/d9cb6fabc90102f9e61fe35bd0160db88f4f53b4"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/190ce5cdc55d1b66ea582ac2be6fd5a72e3cc486"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/5df66302f03f87ae8953785a882d78e911f00c55"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/f9b11229b79c0fb2100b5bb4628a101b1d37fbf6"}],"remediation":[],"revision":"aeaed558e20f902cae8c07fa58478e74165f5d09f4328fbdae7658e48246b660","sources":[{"modifiedAt":1793908181012,"name":"CNA: Linux","retrievedAt":1793909373101,"url":"https://www.cve.org/CVERecord?id=CVE-2022-49613"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793909409940,"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-49613"}],"ssvc":{"assessedAt":1793907983198,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"serial: 8250: Fix PM usage_count for console handover","updatedAt":1793909409940}