In the Linux kernel, the following vulnerability has been resolved:
mISDN: hfcpci: Fix warning when deleting uninitialized timer
With CONFIG_DEBUG_OBJECTS_TIMERS unloading hfcpci module leads to the following splat:
[ 250.215892] ODEBUG: assert_init not available (active state 0) object: ffffffffc01a3dc0 object type: timer_list hint: 0x0 [ 250.217520] WARNING: CPU: 0 PID: 233 at lib/debugobjects.c:612 debug_print_object+0x1b6/0x2c0 [ 250.218775] Modules linked in: hfcpci(-) mISDN_core [ 250.219537] CPU: 0 UID: 0 PID: 233 Comm: rmmod Not tainted 6.17.0-rc2-g6f713187ac98 #2 PREEMPT(voluntary) [ 250.220940] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 250.222377] RIP: 0010:debug_print_object+0x1b6/0x2c0 [ 250.223131] Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 41 56 48 8b 14 dd a0 4e 01 9f 48 89 ee 48 c7 c7 20 46 01 9f e8 cb 84d [ 250.225805] RSP: 0018:ffff888015ea7c08 EFLAGS: 00010286 [ 250.226608] RAX: 0000000000000000 RBX: 0000000000000005 RCX: ffffffff9be93a95 [ 250.227708] RDX: 1ffff1100d945138 RSI: 0000000000000008 RDI: ffff88806ca289c0 [ 250.228993] RBP: ffffffff9f014a00 R08: 0000000000000001 R09: ffffed1002bd4f39 [ 250.230043] R10: ffff888015ea79cf R11: 0000000000000001 R12: 0000000000000001 [ 250.231185] R13: ffffffff9eea0520 R14: 0000000000000000 R15: ffff888015ea7cc8 [ 250.232454] FS: 00007f3208f01540(0000) GS:ffff8880caf5a000(0000) knlGS:0000000000000000 [ 250.233851] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 250.234856] CR2: 00007f32090a7421 CR3: 0000000004d63000 CR4: 00000000000006f0 [ 250.236117] Call Trace: [ 250.236599] <TASK> [ 250.236967] ? trace_irq_enable.constprop.0+0xd4/0x130 [ 250.237920] debug_object_assert_init+0x1f6/0x310 [ 250.238762] ? __pfx_debug_object_assert_init+0x10/0x10 [ 250.239658] ? __lock_acquire+0xdea/0x1c70 [ 250.240369] __try_to_del_timer_sync+0x69/0x140 [ 250.241172] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 250.242058] ? __timer_delete_sync+0xc6/0x120 [ 250.242842] ? lock_acquire+0x30/0x80 [ 250.243474] ? __timer_delete_sync+0xc6/0x120 [ 250.244262] __timer_delete_sync+0x98/0x120 [ 250.245015] HFC_cleanup+0x10/0x20 [hfcpci] [ 250.245704] __do_sys_delete_module+0x348/0x510 [ 250.246461] ? __pfx___do_sys_delete_module+0x10/0x10 [ 250.247338] do_syscall_64+0xc1/0x360 [ 250.247924] entry_SYSCALL_64_after_hwframe+0x77/0x7f
Fix this by initializing hfc_tl timer with DEFINE_TIMER macro. Also, use mod_timer instead of manual timeout update.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Sep 18, 2026 | Sep 16, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 16, 2025 |
| Suse | — | Upgrade kselftests-kmp-defaultUpgrade kernel-default-livepatch-develUpgrade dtb-qcomUpgrade dlm-kmp-rtUpgrade kernel-defaultUpgrade kernel-kvmsmall-vdsoUpgrade kernel-rt-extraUpgrade ocfs2-kmp-defaultUpgrade kernel-rtUpgrade kernel-source-rtUpgrade ocfs2-kmp-azureUpgrade gfs2-kmp-defaultUpgrade kernel-rt-optionalUpgrade kernel-azureUpgrade kernel-source-vanillaUpgrade kernel-rt-livepatchUpgrade kernel-rt_debug-develUpgrade reiserfs-kmp-azureUpgrade reiserfs-kmp-rtUpgrade kselftests-kmp-rtUpgrade kernel-default-baseUpgrade kernel-rt-develUpgrade kernel-rt-vdsoUpgrade kernel-azure-develUpgrade dtb-armUpgrade kernel-obs-buildUpgrade dtb-caviumUpgrade kernel-64kb-extraUpgrade dtb-sprdUpgrade kernel-debug-vdsoUpgrade dtb-allwinnerUpgrade dtb-socionextUpgrade kselftests-kmp-azureUpgrade dlm-kmp-defaultUpgrade cluster-md-kmp-64kbUpgrade dtb-nvidiaUpgrade kernel-default-base-rebuildUpgrade kernel-docsUpgrade gfs2-kmp-azureUpgrade dlm-kmp-azureUpgrade dtb-rockchipUpgrade dtb-hisiliconUpgrade kernel-64kb-develUpgrade gfs2-kmp-64kbUpgrade kernel-rt_debugUpgrade kernel-kvmsmallUpgrade kernel-devel-rtUpgrade dtb-alteraUpgrade dtb-amdUpgrade kernel-syms-rtUpgrade kernel-rt_debug-vdsoUpgrade kernel-kvmsmall-develUpgrade kernel-default-vdsoUpgrade ocfs2-kmp-rtUpgrade kernel-devel-azureUpgrade kernel-azure-optionalUpgrade kernel-zfcpdumpUpgrade kernel-debugUpgrade dtb-freescaleUpgrade dtb-amlogicUpgrade kernel-macrosUpgrade kernel-64kbUpgrade dtb-marvellUpgrade kernel-develUpgrade reiserfs-kmp-64kbUpgrade kernel-syms-azureUpgrade kernel-default-extraUpgrade dtb-mediatekUpgrade dtb-exynosUpgrade cluster-md-kmp-defaultUpgrade reiserfs-kmp-defaultUpgrade kernel-rt-livepatch-develUpgrade kernel-obs-qaUpgrade kernel-64kb-optionalUpgrade dtb-renesasUpgrade kernel-docs-htmlUpgrade dtb-apmUpgrade dtb-amazonUpgrade dlm-kmp-64kbUpgrade cluster-md-kmp-rtUpgrade kselftests-kmp-64kbUpgrade kernel-debug-develUpgrade kernel-azure-vdsoUpgrade kernel-sourceUpgrade kernel-default-livepatchUpgrade kernel-default-develUpgrade dtb-lgUpgrade dtb-broadcomUpgrade cluster-md-kmp-azureUpgrade kernel-symsUpgrade kernel-default-manUpgrade kernel-source-azureUpgrade kernel-default-optionalUpgrade kernel-azure-extraUpgrade gfs2-kmp-rtUpgrade dtb-xilinxUpgrade dtb-appleUpgrade ocfs2-kmp-64kb | Dec 5, 2025 | Oct 15, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 21, 2026 | Sep 16, 2025 |
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