{"id":"DEBIAN-CVE-2022-50511","details":"In the Linux kernel, the following vulnerability has been resolved:  lib/fonts: fix undefined behavior in bit shift for get_default_font  Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned.  The UBSAN warning calltrace like below:  UBSAN: shift-out-of-bounds in lib/fonts/fonts.c:139:20 left shift of 1 by 31 places cannot be represented in type 'int'  \u003cTASK\u003e  dump_stack_lvl+0x7d/0xa5  dump_stack+0x15/0x1b  ubsan_epilogue+0xe/0x4e  __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c  get_default_font+0x1c7/0x1f0  fbcon_startup+0x347/0x3a0  do_take_over_console+0xce/0x270  do_fbcon_takeover+0xa1/0x170  do_fb_registered+0x2a8/0x340  fbcon_fb_registered+0x47/0xe0  register_framebuffer+0x294/0x4a0  __drm_fb_helper_initial_config_and_unlock+0x43c/0x880 [drm_kms_helper]  drm_fb_helper_initial_config+0x52/0x80 [drm_kms_helper]  drm_fbdev_client_hotplug+0x156/0x1b0 [drm_kms_helper]  drm_fbdev_generic_setup+0xfc/0x290 [drm_kms_helper]  bochs_pci_probe+0x6ca/0x772 [bochs]  local_pci_probe+0x4d/0xb0  pci_device_probe+0x119/0x320  really_probe+0x181/0x550  __driver_probe_device+0xc6/0x220  driver_probe_device+0x32/0x100  __driver_attach+0x195/0x200  bus_for_each_dev+0xbb/0x120  driver_attach+0x27/0x30  bus_add_driver+0x22e/0x2f0  driver_register+0xa9/0x190  __pci_register_driver+0x90/0xa0  bochs_pci_driver_init+0x52/0x1000 [bochs]  do_one_initcall+0x76/0x430  do_init_module+0x61/0x28a  load_module+0x1f82/0x2e50  __do_sys_finit_module+0xf8/0x190  __x64_sys_finit_module+0x23/0x30  do_syscall_64+0x58/0x80  entry_SYSCALL_64_after_hwframe+0x63/0xcd  \u003c/TASK\u003e","modified":"2026-09-01T16:05:35.502153552Z","published":"2025-10-07T16:15:34.337Z","upstream":["CVE-2022-50511"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50511"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50511.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50511.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50511.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:N/I:N/A:H"}]}