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

Vulnerability from cvelistv5 – Published: 2025-09-16 13:08 – Updated: 2026-09-02 12:49
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:18 UTC
CWE
  • CWE-908 - Use of Uninitialized Resource
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 , < d8be1288e398ccda2dc590fdaa0551f192f6a1c6 (git)
Affected: 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 , < 75194165e65018c581b128379b91b0b2d64638d9 (git)
Affected: 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 , < 544ffd62ddd093c71150e4d4c542f98153fb8e46 (git)
Affected: 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 , < 43fc5da8133badf17f5df250ba03b9d882254845 (git)
Affected: 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 , < 97766512a9951b9fd6fc97f1b93211642bb0b220 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 6.1.187 , ≤ 6.1.* (semver)
Unaffected: 6.6.156 , ≤ 6.6.* (semver)
Unaffected: 6.12.108 , ≤ 6.12.* (semver)
Unaffected: 6.16.5 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
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              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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            {
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              "status": "unaffected",
              "version": "6.16.5",
              "versionType": "semver"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmISDN: hfcpci: Fix warning when deleting uninitialized timer\n\nWith CONFIG_DEBUG_OBJECTS_TIMERS unloading hfcpci module leads\nto the following splat:\n\n[  250.215892] ODEBUG: assert_init not available (active state 0) object: ffffffffc01a3dc0 object type: timer_list hint: 0x0\n[  250.217520] WARNING: CPU: 0 PID: 233 at lib/debugobjects.c:612 debug_print_object+0x1b6/0x2c0\n[  250.218775] Modules linked in: hfcpci(-) mISDN_core\n[  250.219537] CPU: 0 UID: 0 PID: 233 Comm: rmmod Not tainted 6.17.0-rc2-g6f713187ac98 #2 PREEMPT(voluntary)\n[  250.220940] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[  250.222377] RIP: 0010:debug_print_object+0x1b6/0x2c0\n[  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\n[  250.225805] RSP: 0018:ffff888015ea7c08 EFLAGS: 00010286\n[  250.226608] RAX: 0000000000000000 RBX: 0000000000000005 RCX: ffffffff9be93a95\n[  250.227708] RDX: 1ffff1100d945138 RSI: 0000000000000008 RDI: ffff88806ca289c0\n[  250.228993] RBP: ffffffff9f014a00 R08: 0000000000000001 R09: ffffed1002bd4f39\n[  250.230043] R10: ffff888015ea79cf R11: 0000000000000001 R12: 0000000000000001\n[  250.231185] R13: ffffffff9eea0520 R14: 0000000000000000 R15: ffff888015ea7cc8\n[  250.232454] FS:  00007f3208f01540(0000) GS:ffff8880caf5a000(0000) knlGS:0000000000000000\n[  250.233851] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  250.234856] CR2: 00007f32090a7421 CR3: 0000000004d63000 CR4: 00000000000006f0\n[  250.236117] Call Trace:\n[  250.236599]  \u003cTASK\u003e\n[  250.236967]  ? 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-02T12:49:22.578Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d8be1288e398ccda2dc590fdaa0551f192f6a1c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/75194165e65018c581b128379b91b0b2d64638d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/544ffd62ddd093c71150e4d4c542f98153fb8e46"
        },
        {
          "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",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39833",
    "datePublished": "2025-09-16T13:08:50.192Z",
    "dateReserved": "2025-04-16T07:20:57.140Z",
    "dateUpdated": "2026-09-02T12:49:22.578Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-39833",
      "date": "2026-09-16",
      "epss": "0.00145",
      "percentile": "0.04129"
    },
    "microsoft_vex": {
      "current_release_date": "2026-08-23T14:44:32.000Z",
      "cve": "CVE-2025-39833",
      "id": "msrc_CVE-2025-39833",
      "initial_release_date": "2025-09-20T01:08:58.000Z",
      "product_status:known_affected": "22",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "mISDN: hfcpci: Fix warning when deleting uninitialized timer",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-39833.json",
      "version": "19"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39833\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T14:15:51.580\",\"lastModified\":\"2026-09-02T13:16:49.507\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmISDN: hfcpci: Fix warning when deleting uninitialized timer\\n\\nWith CONFIG_DEBUG_OBJECTS_TIMERS unloading hfcpci module leads\\nto the following splat:\\n\\n[  250.215892] ODEBUG: assert_init not available (active state 0) object: ffffffffc01a3dc0 object type: timer_list hint: 0x0\\n[  250.217520] WARNING: CPU: 0 PID: 233 at lib/debugobjects.c:612 debug_print_object+0x1b6/0x2c0\\n[  250.218775] Modules linked in: hfcpci(-) mISDN_core\\n[  250.219537] CPU: 0 UID: 0 PID: 233 Comm: rmmod Not tainted 6.17.0-rc2-g6f713187ac98 #2 PREEMPT(voluntary)\\n[  250.220940] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\n[  250.222377] RIP: 0010:debug_print_object+0x1b6/0x2c0\\n[  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\\n[  250.225805] RSP: 0018:ffff888015ea7c08 EFLAGS: 00010286\\n[  250.226608] RAX: 0000000000000000 RBX: 0000000000000005 RCX: ffffffff9be93a95\\n[  250.227708] RDX: 1ffff1100d945138 RSI: 0000000000000008 RDI: ffff88806ca289c0\\n[  250.228993] RBP: ffffffff9f014a00 R08: 0000000000000001 R09: ffffed1002bd4f39\\n[  250.230043] R10: ffff888015ea79cf R11: 0000000000000001 R12: 0000000000000001\\n[  250.231185] R13: ffffffff9eea0520 R14: 0000000000000000 R15: ffff888015ea7cc8\\n[  250.232454] FS:  00007f3208f01540(0000) GS:ffff8880caf5a000(0000) knlGS:0000000000000000\\n[  250.233851] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[  250.234856] CR2: 00007f32090a7421 CR3: 0000000004d63000 CR4: 00000000000006f0\\n[  250.236117] Call Trace:\\n[  250.236599]  \u003cTASK\u003e\\n[  250.236967]  ? 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\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/isdn/hardware/mISDN/hfcpci.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\",\"lessThan\":\"d8be1288e398ccda2dc590fdaa0551f192f6a1c6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\",\"lessThan\":\"75194165e65018c581b128379b91b0b2d64638d9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\",\"lessThan\":\"544ffd62ddd093c71150e4d4c542f98153fb8e46\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\",\"lessThan\":\"43fc5da8133badf17f5df250ba03b9d882254845\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\",\"lessThan\":\"97766512a9951b9fd6fc97f1b93211642bb0b220\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/isdn/hardware/mISDN/hfcpci.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.29\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.29\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.187\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.156\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.108\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16.5\",\"lessThanOrEqual\":\"6.16.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T18:18:25.755383Z\",\"id\":\"CVE-2025-39833\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.29\",\"versionEndExcluding\":\"6.16.5\",\"matchCriteriaId\":\"E4B3453C-BB0A-4223-B849-93B363CE7D1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"327D22EF-390B-454C-BD31-2ED23C998A1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C730CD9A-D969-4A8E-9522-162AAF7C0EE9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"39982C4B-716E-4B2F-8196-FA301F47807D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/43fc5da8133badf17f5df250ba03b9d882254845\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/544ffd62ddd093c71150e4d4c542f98153fb8e46\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/75194165e65018c581b128379b91b0b2d64638d9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/97766512a9951b9fd6fc97f1b93211642bb0b220\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d8be1288e398ccda2dc590fdaa0551f192f6a1c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:30:19+00:00",
      "cve": "CVE-2025-39833",
      "id": "CVE-2025-39833",
      "initial_release_date": "2025-09-16T00:00:00+00:00",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "184",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mISDN: hfcpci: Fix warning when deleting uninitialized timer",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39833.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:58:15Z",
      "cve": "CVE-2025-39833",
      "id": "CVE-2025-39833",
      "initial_release_date": "2025-09-16T23:23:40Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "729",
      "product_status:recommended": "501",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-39833",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-39833.json",
      "version": "61"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"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\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:18:21.671Z\"}}], \"cna\": {\"title\": \"mISDN: hfcpci: Fix warning when deleting uninitialized timer\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\", \"lessThan\": \"d8be1288e398ccda2dc590fdaa0551f192f6a1c6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\", \"lessThan\": \"75194165e65018c581b128379b91b0b2d64638d9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\", \"lessThan\": \"544ffd62ddd093c71150e4d4c542f98153fb8e46\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\", \"lessThan\": \"43fc5da8133badf17f5df250ba03b9d882254845\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"87c5fa1bb42624254a2013cbbc3b170d6017f5d6\", \"lessThan\": \"97766512a9951b9fd6fc97f1b93211642bb0b220\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/isdn/hardware/mISDN/hfcpci.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.29\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.29\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.187\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.156\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.108\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.16.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.16.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/isdn/hardware/mISDN/hfcpci.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d8be1288e398ccda2dc590fdaa0551f192f6a1c6\"}, {\"url\": \"https://git.kernel.org/stable/c/75194165e65018c581b128379b91b0b2d64638d9\"}, {\"url\": \"https://git.kernel.org/stable/c/544ffd62ddd093c71150e4d4c542f98153fb8e46\"}, {\"url\": \"https://git.kernel.org/stable/c/43fc5da8133badf17f5df250ba03b9d882254845\"}, {\"url\": \"https://git.kernel.org/stable/c/97766512a9951b9fd6fc97f1b93211642bb0b220\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmISDN: hfcpci: Fix warning when deleting uninitialized timer\\n\\nWith CONFIG_DEBUG_OBJECTS_TIMERS unloading hfcpci module leads\\nto the following splat:\\n\\n[  250.215892] ODEBUG: assert_init not available (active state 0) object: ffffffffc01a3dc0 object type: timer_list hint: 0x0\\n[  250.217520] WARNING: CPU: 0 PID: 233 at lib/debugobjects.c:612 debug_print_object+0x1b6/0x2c0\\n[  250.218775] Modules linked in: hfcpci(-) mISDN_core\\n[  250.219537] CPU: 0 UID: 0 PID: 233 Comm: rmmod Not tainted 6.17.0-rc2-g6f713187ac98 #2 PREEMPT(voluntary)\\n[  250.220940] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\n[  250.222377] RIP: 0010:debug_print_object+0x1b6/0x2c0\\n[  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\\n[  250.225805] RSP: 0018:ffff888015ea7c08 EFLAGS: 00010286\\n[  250.226608] RAX: 0000000000000000 RBX: 0000000000000005 RCX: ffffffff9be93a95\\n[  250.227708] RDX: 1ffff1100d945138 RSI: 0000000000000008 RDI: ffff88806ca289c0\\n[  250.228993] RBP: ffffffff9f014a00 R08: 0000000000000001 R09: ffffed1002bd4f39\\n[  250.230043] R10: ffff888015ea79cf R11: 0000000000000001 R12: 0000000000000001\\n[  250.231185] R13: ffffffff9eea0520 R14: 0000000000000000 R15: ffff888015ea7cc8\\n[  250.232454] FS:  00007f3208f01540(0000) GS:ffff8880caf5a000(0000) knlGS:0000000000000000\\n[  250.233851] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[  250.234856] CR2: 00007f32090a7421 CR3: 0000000004d63000 CR4: 00000000000006f0\\n[  250.236117] Call Trace:\\n[  250.236599]  \u003cTASK\u003e\\n[  250.236967]  ? 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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.187\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.156\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.108\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.16.5\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17\", \"versionStartIncluding\": \"2.6.29\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-09-02T12:49:22.578Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-39833\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-02T12:49:22.578Z\", \"dateReserved\": \"2025-04-16T07:20:57.140Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-16T13:08:50.192Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.