{"id":"DEBIAN-CVE-2025-21821","details":"In the Linux kernel, the following vulnerability has been resolved:  fbdev: omap: use threaded IRQ for LCD DMA  When using touchscreen and framebuffer, Nokia 770 crashes easily with:      BUG: scheduling while atomic: irq/144-ads7846/82/0x00010000     Modules linked in: usb_f_ecm g_ether usb_f_rndis u_ether libcomposite configfs omap_udc ohci_omap ohci_hcd     CPU: 0 UID: 0 PID: 82 Comm: irq/144-ads7846 Not tainted 6.12.7-770 #2     Hardware name: Nokia 770     Call trace:      unwind_backtrace from show_stack+0x10/0x14      show_stack from dump_stack_lvl+0x54/0x5c      dump_stack_lvl from __schedule_bug+0x50/0x70      __schedule_bug from __schedule+0x4d4/0x5bc      __schedule from schedule+0x34/0xa0      schedule from schedule_preempt_disabled+0xc/0x10      schedule_preempt_disabled from __mutex_lock.constprop.0+0x218/0x3b4      __mutex_lock.constprop.0 from clk_prepare_lock+0x38/0xe4      clk_prepare_lock from clk_set_rate+0x18/0x154      clk_set_rate from sossi_read_data+0x4c/0x168      sossi_read_data from hwa742_read_reg+0x5c/0x8c      hwa742_read_reg from send_frame_handler+0xfc/0x300      send_frame_handler from process_pending_requests+0x74/0xd0      process_pending_requests from lcd_dma_irq_handler+0x50/0x74      lcd_dma_irq_handler from __handle_irq_event_percpu+0x44/0x130      __handle_irq_event_percpu from handle_irq_event+0x28/0x68      handle_irq_event from handle_level_irq+0x9c/0x170      handle_level_irq from generic_handle_domain_irq+0x2c/0x3c      generic_handle_domain_irq from omap1_handle_irq+0x40/0x8c      omap1_handle_irq from generic_handle_arch_irq+0x28/0x3c      generic_handle_arch_irq from call_with_stack+0x1c/0x24      call_with_stack from __irq_svc+0x94/0xa8     Exception stack(0xc5255da0 to 0xc5255de8)     5da0: 00000001 c22fc620 00000000 00000000 c08384a8 c106fc00 00000000 c240c248     5dc0: c113a600 c3f6ec30 00000001 00000000 c22fc620 c5255df0 c22fc620 c0279a94     5de0: 60000013 ffffffff      __irq_svc from clk_prepare_lock+0x4c/0xe4      clk_prepare_lock from clk_get_rate+0x10/0x74      clk_get_rate from uwire_setup_transfer+0x40/0x180      uwire_setup_transfer from spi_bitbang_transfer_one+0x2c/0x9c      spi_bitbang_transfer_one from spi_transfer_one_message+0x2d0/0x664      spi_transfer_one_message from __spi_pump_transfer_message+0x29c/0x498      __spi_pump_transfer_message from __spi_sync+0x1f8/0x2e8      __spi_sync from spi_sync+0x24/0x40      spi_sync from ads7846_halfd_read_state+0x5c/0x1c0      ads7846_halfd_read_state from ads7846_irq+0x58/0x348      ads7846_irq from irq_thread_fn+0x1c/0x78      irq_thread_fn from irq_thread+0x120/0x228      irq_thread from kthread+0xc8/0xe8      kthread from ret_from_fork+0x14/0x28  As a quick fix, switch to a threaded IRQ which provides a stable system.","modified":"2026-09-01T16:06:10.391558982Z","published":"2025-02-27T20:16:04.613Z","upstream":["CVE-2025-21821"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-21821"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.129-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21821.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.16-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21821.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.16-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21821.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"}]}