CVE-2025-39833 (GCVE-0-2025-39833)

Vulnerability from cvelistv5 – Published: 2025-09-16 13:08 – Updated: 2026-01-14 18:22
VLAI?
Title
mISDN: hfcpci: Fix warning when deleting uninitialized timer
Summary
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.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-908 - Use of Uninitialized Resource
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 , < 43fc5da8133badf17f5df250ba03b9d882254845 (git)
Affected: 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 , < 97766512a9951b9fd6fc97f1b93211642bb0b220 (git)
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    Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 6.16.5 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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trace_irq_enable.constprop.0+0xd4/0x130\\n[  250.237920]  debug_object_assert_init+0x1f6/0x310\\n[  250.238762]  ? __pfx_debug_object_assert_init+0x10/0x10\\n[  250.239658]  ? __lock_acquire+0xdea/0x1c70\\n[  250.240369]  __try_to_del_timer_sync+0x69/0x140\\n[  250.241172]  ? __pfx___try_to_del_timer_sync+0x10/0x10\\n[  250.242058]  ? __timer_delete_sync+0xc6/0x120\\n[  250.242842]  ? lock_acquire+0x30/0x80\\n[  250.243474]  ? __timer_delete_sync+0xc6/0x120\\n[  250.244262]  __timer_delete_sync+0x98/0x120\\n[  250.245015]  HFC_cleanup+0x10/0x20 [hfcpci]\\n[  250.245704]  __do_sys_delete_module+0x348/0x510\\n[  250.246461]  ? __pfx___do_sys_delete_module+0x10/0x10\\n[  250.247338]  do_syscall_64+0xc1/0x360\\n[  250.247924]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nFix this by initializing hfc_tl timer with DEFINE_TIMER macro.\\nAlso, use mod_timer instead of manual timeout update.\"}], \"affected\": [{\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"unaffected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"drivers/isdn/hardware/mISDN/hfcpci.c\"], \"versions\": [{\"version\": \"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\", \"lessThan\": \"43fc5da8133badf17f5df250ba03b9d882254845\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\", \"lessThan\": \"97766512a9951b9fd6fc97f1b93211642bb0b220\", \"status\": \"affected\", \"versionType\": \"git\"}]}, {\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"affected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"drivers/isdn/hardware/mISDN/hfcpci.c\"], \"versions\": [{\"version\": \"2.6.29\", \"status\": \"affected\"}, {\"version\": \"0\", \"lessThan\": \"2.6.29\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.16.5\", \"lessThanOrEqual\": \"6.16.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"6.17\", \"lessThanOrEqual\": \"*\", \"status\": \"unaffected\", \"versionType\": \"original_commit_for_fix\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"2.6.29\", \"versionEndExcluding\": \"6.16.5\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"2.6.29\", \"versionEndExcluding\": \"6.17\"}]}]}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/43fc5da8133badf17f5df250ba03b9d882254845\"}, {\"url\": \"https://git.kernel.org/stable/c/97766512a9951b9fd6fc97f1b93211642bb0b220\"}], \"title\": \"mISDN: hfcpci: Fix warning when deleting uninitialized timer\", \"x_generator\": {\"engine\": \"bippy-1.2.0\"}}, \"adp\": [{\"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-39833\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:18:25.755383Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-908\", \"description\": \"CWE-908 Use of Uninitialized Resource\"}]}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2026-01-14T18:18:21.671Z\"}, \"title\": \"CISA ADP Vulnrichment\"}]}",
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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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