{"id":"DEBIAN-CVE-2022-50320","details":"In the Linux kernel, the following vulnerability has been resolved:  ACPI: tables: FPDT: Don't call acpi_os_map_memory() on invalid phys address  On a Packard Bell Dot SC (Intel Atom N2600 model) there is a FPDT table which contains invalid physical addresses, with high bits set which fall outside the range of the CPU-s supported physical address range.  Calling acpi_os_map_memory() on such an invalid phys address leads to the below WARN_ON in ioremap triggering resulting in an oops/stacktrace.  Add code to verify the physical address before calling acpi_os_map_memory() to fix / avoid the oops.  [    1.226900] ioremap: invalid physical address 3001000000000000 [    1.226949] ------------[ cut here ]------------ [    1.226962] WARNING: CPU: 1 PID: 1 at arch/x86/mm/ioremap.c:200 __ioremap_caller.cold+0x43/0x5f [    1.226996] Modules linked in: [    1.227016] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc3+ #490 [    1.227029] Hardware name: Packard Bell dot s/SJE01_CT, BIOS V1.10 07/23/2013 [    1.227038] RIP: 0010:__ioremap_caller.cold+0x43/0x5f [    1.227054] Code: 96 00 00 e9 f8 af 24 ff 89 c6 48 c7 c7 d8 0c 84 99 e8 6a 96 00 00 e9 76 af 24 ff 48 89 fe 48 c7 c7 a8 0c 84 99 e8 56 96 00 00 \u003c0f\u003e 0b e9 60 af 24 ff 48 8b 34 24 48 c7 c7 40 0d 84 99 e8 3f 96 00 [    1.227067] RSP: 0000:ffffb18c40033d60 EFLAGS: 00010286 [    1.227084] RAX: 0000000000000032 RBX: 3001000000000000 RCX: 0000000000000000 [    1.227095] RDX: 0000000000000001 RSI: 00000000ffffdfff RDI: 00000000ffffffff [    1.227105] RBP: 3001000000000000 R08: 0000000000000000 R09: ffffb18c40033c18 [    1.227115] R10: 0000000000000003 R11: ffffffff99d62fe8 R12: 0000000000000008 [    1.227124] R13: 0003001000000000 R14: 0000000000001000 R15: 3001000000000000 [    1.227135] FS:  0000000000000000(0000) GS:ffff913a3c080000(0000) knlGS:0000000000000000 [    1.227146] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [    1.227156] CR2: 0000000000000000 CR3: 0000000018c26000 CR4: 00000000000006e0 [    1.227167] Call Trace: [    1.227176]  \u003cTASK\u003e [    1.227185]  ? acpi_os_map_iomem+0x1c9/0x1e0 [    1.227215]  ? kmem_cache_alloc_trace+0x187/0x370 [    1.227254]  acpi_os_map_iomem+0x1c9/0x1e0 [    1.227288]  acpi_init_fpdt+0xa8/0x253 [    1.227308]  ? acpi_debugfs_init+0x1f/0x1f [    1.227339]  do_one_initcall+0x5a/0x300 [    1.227406]  ? rcu_read_lock_sched_held+0x3f/0x80 [    1.227442]  kernel_init_freeable+0x28b/0x2cc [    1.227512]  ? rest_init+0x170/0x170 [    1.227538]  kernel_init+0x16/0x140 [    1.227552]  ret_from_fork+0x1f/0x30 [    1.227639]  \u003c/TASK\u003e [    1.227647] irq event stamp: 186819 [    1.227656] hardirqs last  enabled at (186825): [\u003cffffffff98184a6e\u003e] __up_console_sem+0x5e/0x70 [    1.227672] hardirqs last disabled at (186830): [\u003cffffffff98184a53\u003e] __up_console_sem+0x43/0x70 [    1.227686] softirqs last  enabled at (186576): [\u003cffffffff980fbc9d\u003e] __irq_exit_rcu+0xed/0x160 [    1.227701] softirqs last disabled at (186569): [\u003cffffffff980fbc9d\u003e] __irq_exit_rcu+0xed/0x160 [    1.227715] ---[ end trace 0000000000000000 ]---","modified":"2026-08-27T23:04:31.578906830Z","published":"2025-09-15T15:15:43.997Z","upstream":["CVE-2022-50320"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50320"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50320.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50320.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.3-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50320.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}