{"id":"DEBIAN-CVE-2026-23369","details":"In the Linux kernel, the following vulnerability has been resolved:  i2c: i801: Revert \"i2c: i801: replace acpi_lock with I2C bus lock\"  This reverts commit f707d6b9e7c18f669adfdb443906d46cfbaaa0c1.  Under rare circumstances, multiple udev threads can collect i801 device info on boot and walk i801_acpi_io_handler somewhat concurrently. The first will note the area is reserved by acpi to prevent further touches. This ultimately causes the area to be deregistered. The second will enter i801_acpi_io_handler after the area is unregistered but before a check can be made that the area is unregistered. i2c_lock_bus relies on the now unregistered area containing lock_ops to lock the bus. The end result is a kernel panic on boot with the following backtrace;  [   14.971872] ioatdma 0000:09:00.2: enabling device (0100 -\u003e 0102) [   14.971873] BUG: kernel NULL pointer dereference, address: 0000000000000000 [   14.971880] #PF: supervisor read access in kernel mode [   14.971884] #PF: error_code(0x0000) - not-present page [   14.971887] PGD 0 P4D 0 [   14.971894] Oops: 0000 [#1] PREEMPT SMP PTI [   14.971900] CPU: 5 PID: 956 Comm: systemd-udevd Not tainted 5.14.0-611.5.1.el9_7.x86_64 #1 [   14.971905] Hardware name: XXXXXXXXXXXXXXXXXXXXXXX BIOS 1.20.10.SV91 01/30/2023 [   14.971908] RIP: 0010:i801_acpi_io_handler+0x2d/0xb0 [i2c_i801] [   14.971929] Code: 00 00 49 8b 40 20 41 57 41 56 4d 8b b8 30 04 00 00 49 89 ce 41 55 41 89 d5 41 54 49 89 f4 be 02 00 00 00 55 4c 89 c5 53 89 fb \u003c48\u003e 8b 00 4c 89 c7 e8 18 61 54 e9 80 bd 80 04 00 00 00 75 09 4c 3b [   14.971933] RSP: 0018:ffffbaa841483838 EFLAGS: 00010282 [   14.971938] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff9685e01ba568 [   14.971941] RDX: 0000000000000008 RSI: 0000000000000002 RDI: 0000000000000000 [   14.971944] RBP: ffff9685ca22f028 R08: ffff9685ca22f028 R09: ffff9685ca22f028 [   14.971948] R10: 000000000000000b R11: 0000000000000580 R12: 0000000000000580 [   14.971951] R13: 0000000000000008 R14: ffff9685e01ba568 R15: ffff9685c222f000 [   14.971954] FS:  00007f8287c0ab40(0000) GS:ffff96a47f940000(0000) knlGS:0000000000000000 [   14.971959] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [   14.971963] CR2: 0000000000000000 CR3: 0000000168090001 CR4: 00000000003706f0 [   14.971966] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [   14.971968] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [   14.971972] Call Trace: [   14.971977]  \u003cTASK\u003e [   14.971981]  ? show_trace_log_lvl+0x1c4/0x2df [   14.971994]  ? show_trace_log_lvl+0x1c4/0x2df [   14.972003]  ? acpi_ev_address_space_dispatch+0x16e/0x3c0 [   14.972014]  ? __die_body.cold+0x8/0xd [   14.972021]  ? page_fault_oops+0x132/0x170 [   14.972028]  ? exc_page_fault+0x61/0x150 [   14.972036]  ? asm_exc_page_fault+0x22/0x30 [   14.972045]  ? i801_acpi_io_handler+0x2d/0xb0 [i2c_i801] [   14.972061]  acpi_ev_address_space_dispatch+0x16e/0x3c0 [   14.972069]  ? __pfx_i801_acpi_io_handler+0x10/0x10 [i2c_i801] [   14.972085]  acpi_ex_access_region+0x5b/0xd0 [   14.972093]  acpi_ex_field_datum_io+0x73/0x2e0 [   14.972100]  acpi_ex_read_data_from_field+0x8e/0x230 [   14.972106]  acpi_ex_resolve_node_to_value+0x23d/0x310 [   14.972114]  acpi_ds_evaluate_name_path+0xad/0x110 [   14.972121]  acpi_ds_exec_end_op+0x321/0x510 [   14.972127]  acpi_ps_parse_loop+0xf7/0x680 [   14.972136]  acpi_ps_parse_aml+0x17a/0x3d0 [   14.972143]  acpi_ps_execute_method+0x137/0x270 [   14.972150]  acpi_ns_evaluate+0x1f4/0x2e0 [   14.972158]  acpi_evaluate_object+0x134/0x2f0 [   14.972164]  acpi_evaluate_integer+0x50/0xe0 [   14.972173]  ? vsnprintf+0x24b/0x570 [   14.972181]  acpi_ac_get_state.part.0+0x23/0x70 [   14.972189]  get_ac_property+0x4e/0x60 [   14.972195]  power_supply_show_property+0x90/0x1f0 [   14.972205]  add_prop_uevent+0x29/0x90 [   14.972213]  power_supply_uevent+0x109/0x1d0 [   14.972222]  dev_uevent+0x10e/0x2f0 [   14.972228]  uevent_show+0x8e/0x100 [   14.972236]  dev_attr_show+0x19 ---truncated---","modified":"2026-08-27T23:05:56.021024857Z","published":"2026-03-25T11:16:36.347Z","upstream":["CVE-2026-23369"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-23369"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.85-1"}]}],"versions":["6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23369.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.19.8-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19.6-1","6.19.6-2","6.19.6-2~bpo13+1","6.19.8-1~bpo13+1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23369.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"}]}