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'
<TASK>
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
</TASK>
References
Configurations
Configuration 1 (hide)
|
History
05 Feb 2026, 15:19
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/6fe888c4d2fb174408e4540bb2d5602b9f507f90 - Patch | |
| References | () https://git.kernel.org/stable/c/890d91b31f4874361e0df047f57d268a7021cb12 - Patch | |
| References | () https://git.kernel.org/stable/c/9c14a85e18a58c102ec223144b7edb5b345c1bea - Patch | |
| References | () https://git.kernel.org/stable/c/c9a9aa02f0fa3318e0ae5774f404419a1b4759ca - Patch | |
| References | () https://git.kernel.org/stable/c/e039929e36818507e90901edae87f6fa8bc81093 - Patch | |
| References | () https://git.kernel.org/stable/c/e83b47580a0738361772d6f24286adfdaba57e36 - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | NVD-CWE-noinfo | |
| CPE | cpe:2.3:o:linux:linux_kernel:2.6.23:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.23:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.23:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.23:rc8:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.23:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.23:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.23:rc9:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.23:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.23:rc2:*:*:*:*:*:* |
|
| First Time |
Linux
Linux linux Kernel |
07 Oct 2025, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-07 16:15
Updated : 2026-02-05 15:19
NVD link : CVE-2022-50511
Mitre link : CVE-2022-50511
CVE.ORG link : CVE-2022-50511
JSON object : View
Products Affected
linux
- linux_kernel
CWE