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CVE-2021-47468 (GCVE-0-2021-47468)

Vulnerability from cvelistv5 – Published: 2024-05-22 06:23 – Updated: 2026-05-11 13:55
VLAI
Title
isdn: mISDN: Fix sleeping function called from invalid context
Summary
In the Linux kernel, the following vulnerability has been resolved: isdn: mISDN: Fix sleeping function called from invalid context The driver can call card->isac.release() function from an atomic context. Fix this by calling this function after releasing the lock. The following log reveals it: [ 44.168226 ] BUG: sleeping function called from invalid context at kernel/workqueue.c:3018 [ 44.168941 ] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5475, name: modprobe [ 44.169574 ] INFO: lockdep is turned off. [ 44.169899 ] irq event stamp: 0 [ 44.170160 ] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 44.170627 ] hardirqs last disabled at (0): [<ffffffff814209ed>] copy_process+0x132d/0x3e00 [ 44.171240 ] softirqs last enabled at (0): [<ffffffff81420a1a>] copy_process+0x135a/0x3e00 [ 44.171852 ] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 44.172318 ] Preemption disabled at: [ 44.172320 ] [<ffffffffa009b0a9>] nj_release+0x69/0x500 [netjet] [ 44.174441 ] Call Trace: [ 44.174630 ] dump_stack_lvl+0xa8/0xd1 [ 44.174912 ] dump_stack+0x15/0x17 [ 44.175166 ] ___might_sleep+0x3a2/0x510 [ 44.175459 ] ? nj_release+0x69/0x500 [netjet] [ 44.175791 ] __might_sleep+0x82/0xe0 [ 44.176063 ] ? start_flush_work+0x20/0x7b0 [ 44.176375 ] start_flush_work+0x33/0x7b0 [ 44.176672 ] ? trace_irq_enable_rcuidle+0x85/0x170 [ 44.177034 ] ? kasan_quarantine_put+0xaa/0x1f0 [ 44.177372 ] ? kasan_quarantine_put+0xaa/0x1f0 [ 44.177711 ] __flush_work+0x11a/0x1a0 [ 44.177991 ] ? flush_work+0x20/0x20 [ 44.178257 ] ? lock_release+0x13c/0x8f0 [ 44.178550 ] ? __kasan_check_write+0x14/0x20 [ 44.178872 ] ? do_raw_spin_lock+0x148/0x360 [ 44.179187 ] ? read_lock_is_recursive+0x20/0x20 [ 44.179530 ] ? __kasan_check_read+0x11/0x20 [ 44.179846 ] ? do_raw_spin_unlock+0x55/0x900 [ 44.180168 ] ? ____kasan_slab_free+0x116/0x140 [ 44.180505 ] ? _raw_spin_unlock_irqrestore+0x41/0x60 [ 44.180878 ] ? skb_queue_purge+0x1a3/0x1c0 [ 44.181189 ] ? kfree+0x13e/0x290 [ 44.181438 ] flush_work+0x17/0x20 [ 44.181695 ] mISDN_freedchannel+0xe8/0x100 [ 44.182006 ] isac_release+0x210/0x260 [mISDNipac] [ 44.182366 ] nj_release+0xf6/0x500 [netjet] [ 44.182685 ] nj_remove+0x48/0x70 [netjet] [ 44.182989 ] pci_device_remove+0xa9/0x250
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:36 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a900845e56617edc005fd8f35bfd5a407aaf96c8 , < 6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b (git)
Affected: a900845e56617edc005fd8f35bfd5a407aaf96c8 , < ef269a8808cb1759245a98a7fe16fceaebad894c (git)
Affected: a900845e56617edc005fd8f35bfd5a407aaf96c8 , < 37e4f57b22cc5ebb3f80cf0f74fdeb487f082367 (git)
Affected: a900845e56617edc005fd8f35bfd5a407aaf96c8 , < a5b34409d3fc52114c828be4adbc30744fa3258b (git)
Affected: a900845e56617edc005fd8f35bfd5a407aaf96c8 , < 4054b869dc263228d30a4755800b78f0f2ba0c89 (git)
Affected: a900845e56617edc005fd8f35bfd5a407aaf96c8 , < 9f591cbdbed3d7822b2bdba89b34a6d7b434317d (git)
Affected: a900845e56617edc005fd8f35bfd5a407aaf96c8 , < f5966ba53013149bcf94e1536644a958dd00a026 (git)
Affected: a900845e56617edc005fd8f35bfd5a407aaf96c8 , < 6510e80a0b81b5d814e3aea6297ba42f5e76f73c (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 4.4.290 , ≤ 4.4.* (semver)
Unaffected: 4.9.288 , ≤ 4.9.* (semver)
Unaffected: 4.14.253 , ≤ 4.14.* (semver)
Unaffected: 4.19.214 , ≤ 4.19.* (semver)
Unaffected: 5.4.156 , ≤ 5.4.* (semver)
Unaffected: 5.10.76 , ≤ 5.10.* (semver)
Unaffected: 5.14.15 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisdn: mISDN: Fix sleeping function called from invalid context\n\nThe driver can call card-\u003eisac.release() function from an atomic\ncontext.\n\nFix this by calling this function after releasing the lock.\n\nThe following log reveals it:\n\n[   44.168226 ] BUG: sleeping function called from invalid context at kernel/workqueue.c:3018\n[   44.168941 ] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5475, name: modprobe\n[   44.169574 ] INFO: lockdep is turned off.\n[   44.169899 ] irq event stamp: 0\n[   44.170160 ] hardirqs last  enabled at (0): [\u003c0000000000000000\u003e] 0x0\n[   44.170627 ] hardirqs last disabled at (0): [\u003cffffffff814209ed\u003e] copy_process+0x132d/0x3e00\n[   44.171240 ] softirqs last  enabled at (0): [\u003cffffffff81420a1a\u003e] copy_process+0x135a/0x3e00\n[   44.171852 ] softirqs last disabled at (0): [\u003c0000000000000000\u003e] 0x0\n[   44.172318 ] Preemption disabled at:\n[   44.172320 ] [\u003cffffffffa009b0a9\u003e] nj_release+0x69/0x500 [netjet]\n[   44.174441 ] Call Trace:\n[   44.174630 ]  dump_stack_lvl+0xa8/0xd1\n[   44.174912 ]  dump_stack+0x15/0x17\n[   44.175166 ]  ___might_sleep+0x3a2/0x510\n[   44.175459 ]  ? nj_release+0x69/0x500 [netjet]\n[   44.175791 ]  __might_sleep+0x82/0xe0\n[   44.176063 ]  ? start_flush_work+0x20/0x7b0\n[   44.176375 ]  start_flush_work+0x33/0x7b0\n[   44.176672 ]  ? trace_irq_enable_rcuidle+0x85/0x170\n[   44.177034 ]  ? kasan_quarantine_put+0xaa/0x1f0\n[   44.177372 ]  ? kasan_quarantine_put+0xaa/0x1f0\n[   44.177711 ]  __flush_work+0x11a/0x1a0\n[   44.177991 ]  ? flush_work+0x20/0x20\n[   44.178257 ]  ? lock_release+0x13c/0x8f0\n[   44.178550 ]  ? __kasan_check_write+0x14/0x20\n[   44.178872 ]  ? do_raw_spin_lock+0x148/0x360\n[   44.179187 ]  ? read_lock_is_recursive+0x20/0x20\n[   44.179530 ]  ? __kasan_check_read+0x11/0x20\n[   44.179846 ]  ? do_raw_spin_unlock+0x55/0x900\n[   44.180168 ]  ? ____kasan_slab_free+0x116/0x140\n[   44.180505 ]  ? _raw_spin_unlock_irqrestore+0x41/0x60\n[   44.180878 ]  ? skb_queue_purge+0x1a3/0x1c0\n[   44.181189 ]  ? kfree+0x13e/0x290\n[   44.181438 ]  flush_work+0x17/0x20\n[   44.181695 ]  mISDN_freedchannel+0xe8/0x100\n[   44.182006 ]  isac_release+0x210/0x260 [mISDNipac]\n[   44.182366 ]  nj_release+0xf6/0x500 [netjet]\n[   44.182685 ]  nj_remove+0x48/0x70 [netjet]\n[   44.182989 ]  pci_device_remove+0xa9/0x250"
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: isdn: mISDN: corrige la funci\u00f3n de suspensi\u00f3n llamada desde un contexto no v\u00e1lido. El controlador puede llamar a la funci\u00f3n card-\u0026gt;isac.release() desde un contexto at\u00f3mico. Solucione este problema llamando a esta funci\u00f3n despu\u00e9s de liberar el bloqueo. El siguiente registro lo revela: [44.168226] ERROR: funci\u00f3n inactiva llamada desde un contexto no v\u00e1lido en kernel/workqueue.c:3018 [44.168941] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5475, nombre: modprobe [44.169574] INFORMACI\u00d3N: lockdep est\u00e1 desactivado. [ 44.169899 ] sello de evento irq: 0 [ 44.170160 ] hardirqs habilitado por \u00faltima vez en (0): [\u0026lt;0000000000000000\u0026gt;] 0x0 [ 44.170627 ] hardirqs deshabilitado por \u00faltima vez en (0): [] copy_process+0x132d/0x3e00 [ 44.171240 ] softirqs habilitado por \u00faltima vez en (0): [] copy_process+0x135a/0x3e00 [ 44.171852 ] softirqs deshabilitado por \u00faltima vez en (0): [\u0026lt;00000000000000000\u0026gt;] 0x0 [ 44.172318 ] Preferencia deshabilitada en: [ 44.172320 ] ffa009b0a9\u0026gt;] nj_release +0x69/0x500 [netjet] [ 44.174441 ] Seguimiento de llamadas: [ 44.174630 ] dump_stack_lvl+0xa8/0xd1 [ 44.174912 ] dump_stack+0x15/0x17 [ 44.175166 ] ___might_sleep+0x3a2/0x510 [ 44.175459 ] ? nj_release+0x69/0x500 [netjet] [ 44.175791 ] __might_sleep+0x82/0xe0 [ 44.176063 ] ? start_flush_work+0x20/0x7b0 [ 44.176375 ] start_flush_work+0x33/0x7b0 [ 44.176672 ] ? trace_irq_enable_rcuidle+0x85/0x170 [44.177034]? kasan_quarantine_put+0xaa/0x1f0 [ 44.177372 ] ? kasan_quarantine_put+0xaa/0x1f0 [ 44.177711 ] __flush_work+0x11a/0x1a0 [ 44.177991 ] ? Flush_work+0x20/0x20 [44.178257]? lock_release+0x13c/0x8f0 [44.178550]? __kasan_check_write+0x14/0x20 [44.178872]? do_raw_spin_lock+0x148/0x360 [44.179187]? read_lock_is_recursive+0x20/0x20 [44.179530]? __kasan_check_read+0x11/0x20 [44.179846]? do_raw_spin_unlock+0x55/0x900 [44.180168]? ____kasan_slab_free+0x116/0x140 [44.180505]? _raw_spin_unlock_irqrestore+0x41/0x60 [44.180878]? skb_queue_purge+0x1a3/0x1c0 [44.181189]? kfree+0x13e/0x290 [ 44.181438 ] Flush_work+0x17/0x20 [ 44.181695 ] mISDN_freedchannel+0xe8/0x100 [ 44.182006 ] isac_release+0x210/0x260 [mISDNipac] [ 44.182366 nj _release+0xf6/0x500 [netjet] [ 44.182685 ] nj_remove+0x48/ 0x70 [netjet] [44.182989] pci_device_remove+0xa9/0x250"
        }
      ],
      "id": "CVE-2021-47468",
      "lastModified": "2024-11-21T06:36:13.810",
      "published": "2024-05-22T07:15:11.603",
      "references": [
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/37e4f57b22cc5ebb3f80cf0f74fdeb487f082367"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/4054b869dc263228d30a4755800b78f0f2ba0c89"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/6510e80a0b81b5d814e3aea6297ba42f5e76f73c"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/9f591cbdbed3d7822b2bdba89b34a6d7b434317d"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/a5b34409d3fc52114c828be4adbc30744fa3258b"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/ef269a8808cb1759245a98a7fe16fceaebad894c"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/f5966ba53013149bcf94e1536644a958dd00a026"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/37e4f57b22cc5ebb3f80cf0f74fdeb487f082367"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/4054b869dc263228d30a4755800b78f0f2ba0c89"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/6510e80a0b81b5d814e3aea6297ba42f5e76f73c"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/9f591cbdbed3d7822b2bdba89b34a6d7b434317d"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/a5b34409d3fc52114c828be4adbc30744fa3258b"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/ef269a8808cb1759245a98a7fe16fceaebad894c"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/f5966ba53013149bcf94e1536644a958dd00a026"
        }
      ],
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/isdn/hardware/mISDN/netjet.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b",
                    "status": "affected",
                    "version": "a900845e56617edc005fd8f35bfd5a407aaf96c8",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "ef269a8808cb1759245a98a7fe16fceaebad894c",
                    "status": "affected",
                    "version": "a900845e56617edc005fd8f35bfd5a407aaf96c8",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "37e4f57b22cc5ebb3f80cf0f74fdeb487f082367",
                    "status": "affected",
                    "version": "a900845e56617edc005fd8f35bfd5a407aaf96c8",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "a5b34409d3fc52114c828be4adbc30744fa3258b",
                    "status": "affected",
                    "version": "a900845e56617edc005fd8f35bfd5a407aaf96c8",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "4054b869dc263228d30a4755800b78f0f2ba0c89",
                    "status": "affected",
                    "version": "a900845e56617edc005fd8f35bfd5a407aaf96c8",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "9f591cbdbed3d7822b2bdba89b34a6d7b434317d",
                    "status": "affected",
                    "version": "a900845e56617edc005fd8f35bfd5a407aaf96c8",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f5966ba53013149bcf94e1536644a958dd00a026",
                    "status": "affected",
                    "version": "a900845e56617edc005fd8f35bfd5a407aaf96c8",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6510e80a0b81b5d814e3aea6297ba42f5e76f73c",
                    "status": "affected",
                    "version": "a900845e56617edc005fd8f35bfd5a407aaf96c8",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/isdn/hardware/mISDN/netjet.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "2.6.32"
                  },
                  {
                    "lessThan": "2.6.32",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "4.4.*",
                    "status": "unaffected",
                    "version": "4.4.290",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "4.9.*",
                    "status": "unaffected",
                    "version": "4.9.288",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "4.14.*",
                    "status": "unaffected",
                    "version": "4.14.253",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "4.19.*",
                    "status": "unaffected",
                    "version": "4.19.214",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.4.*",
                    "status": "unaffected",
                    "version": "5.4.156",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.76",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.14.*",
                    "status": "unaffected",
                    "version": "5.14.15",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "5.15",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C56A8089-600C-4D13-B0BD-0B3B87CAAAEC",
                    "versionEndExcluding": "4.4.290",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F99C0BFE-2803-4525-BA2B-EA4F42F8CADE",
                    "versionEndExcluding": "4.9.288",
                    "versionStartIncluding": "4.5",
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                  {
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                    "matchCriteriaId": "1830428A-CB40-4E7F-A4F9-177A0B9614D2",
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                  {
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                  {
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                    "matchCriteriaId": "63BD46C4-473F-45F9-93E9-F67D955321D8",
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                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644",
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                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "60134C3A-06E4-48C1-B04F-2903732A4E56",
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                    "matchCriteriaId": "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*",
                    "matchCriteriaId": "AF55383D-4DF2-45DC-93F7-571F4F978EAB",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "9E9481B2-8AA6-4CBD-B5D3-C10F51FF6D01",
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                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisdn: mISDN: Fix sleeping function called from invalid context\n\nThe driver can call card-\u003eisac.release() function from an atomic\ncontext.\n\nFix this by calling this function after releasing the lock.\n\nThe following log reveals it:\n\n[   44.168226 ] BUG: sleeping function called from invalid context at kernel/workqueue.c:3018\n[   44.168941 ] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5475, name: modprobe\n[   44.169574 ] INFO: lockdep is turned off.\n[   44.169899 ] irq event stamp: 0\n[   44.170160 ] hardirqs last  enabled at (0): [\u003c0000000000000000\u003e] 0x0\n[   44.170627 ] hardirqs last disabled at (0): [\u003cffffffff814209ed\u003e] copy_process+0x132d/0x3e00\n[   44.171240 ] softirqs last  enabled at (0): [\u003cffffffff81420a1a\u003e] copy_process+0x135a/0x3e00\n[   44.171852 ] softirqs last disabled at (0): [\u003c0000000000000000\u003e] 0x0\n[   44.172318 ] Preemption disabled at:\n[   44.172320 ] [\u003cffffffffa009b0a9\u003e] nj_release+0x69/0x500 [netjet]\n[   44.174441 ] Call Trace:\n[   44.174630 ]  dump_stack_lvl+0xa8/0xd1\n[   44.174912 ]  dump_stack+0x15/0x17\n[   44.175166 ]  ___might_sleep+0x3a2/0x510\n[   44.175459 ]  ? nj_release+0x69/0x500 [netjet]\n[   44.175791 ]  __might_sleep+0x82/0xe0\n[   44.176063 ]  ? start_flush_work+0x20/0x7b0\n[   44.176375 ]  start_flush_work+0x33/0x7b0\n[   44.176672 ]  ? trace_irq_enable_rcuidle+0x85/0x170\n[   44.177034 ]  ? kasan_quarantine_put+0xaa/0x1f0\n[   44.177372 ]  ? kasan_quarantine_put+0xaa/0x1f0\n[   44.177711 ]  __flush_work+0x11a/0x1a0\n[   44.177991 ]  ? flush_work+0x20/0x20\n[   44.178257 ]  ? lock_release+0x13c/0x8f0\n[   44.178550 ]  ? __kasan_check_write+0x14/0x20\n[   44.178872 ]  ? do_raw_spin_lock+0x148/0x360\n[   44.179187 ]  ? read_lock_is_recursive+0x20/0x20\n[   44.179530 ]  ? __kasan_check_read+0x11/0x20\n[   44.179846 ]  ? do_raw_spin_unlock+0x55/0x900\n[   44.180168 ]  ? ____kasan_slab_free+0x116/0x140\n[   44.180505 ]  ? _raw_spin_unlock_irqrestore+0x41/0x60\n[   44.180878 ]  ? skb_queue_purge+0x1a3/0x1c0\n[   44.181189 ]  ? kfree+0x13e/0x290\n[   44.181438 ]  flush_work+0x17/0x20\n[   44.181695 ]  mISDN_freedchannel+0xe8/0x100\n[   44.182006 ]  isac_release+0x210/0x260 [mISDNipac]\n[   44.182366 ]  nj_release+0xf6/0x500 [netjet]\n[   44.182685 ]  nj_remove+0x48/0x70 [netjet]\n[   44.182989 ]  pci_device_remove+0xa9/0x250"
          },
          {
            "lang": "es",
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        "lastModified": "2026-06-17T04:17:32.740",
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                  "version": "5.15",
                  "versionType": "original_commit_for_fix"
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            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisdn: mISDN: Fix sleeping function called from invalid context\n\nThe driver can call card-\u003eisac.release() function from an atomic\ncontext.\n\nFix this by calling this function after releasing the lock.\n\nThe following log reveals it:\n\n[   44.168226 ] BUG: sleeping function called from invalid context at kernel/workqueue.c:3018\n[   44.168941 ] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 5475, name: modprobe\n[   44.169574 ] INFO: lockdep is turned off.\n[   44.169899 ] irq event stamp: 0\n[   44.170160 ] hardirqs last  enabled at (0): [\u003c0000000000000000\u003e] 0x0\n[   44.170627 ] hardirqs last disabled at (0): [\u003cffffffff814209ed\u003e] copy_process+0x132d/0x3e00\n[   44.171240 ] softirqs last  enabled at (0): [\u003cffffffff81420a1a\u003e] copy_process+0x135a/0x3e00\n[   44.171852 ] softirqs last disabled at (0): [\u003c0000000000000000\u003e] 0x0\n[   44.172318 ] Preemption disabled at:\n[   44.172320 ] [\u003cffffffffa009b0a9\u003e] nj_release+0x69/0x500 [netjet]\n[   44.174441 ] Call Trace:\n[   44.174630 ]  dump_stack_lvl+0xa8/0xd1\n[   44.174912 ]  dump_stack+0x15/0x17\n[   44.175166 ]  ___might_sleep+0x3a2/0x510\n[   44.175459 ]  ? nj_release+0x69/0x500 [netjet]\n[   44.175791 ]  __might_sleep+0x82/0xe0\n[   44.176063 ]  ? start_flush_work+0x20/0x7b0\n[   44.176375 ]  start_flush_work+0x33/0x7b0\n[   44.176672 ]  ? trace_irq_enable_rcuidle+0x85/0x170\n[   44.177034 ]  ? kasan_quarantine_put+0xaa/0x1f0\n[   44.177372 ]  ? kasan_quarantine_put+0xaa/0x1f0\n[   44.177711 ]  __flush_work+0x11a/0x1a0\n[   44.177991 ]  ? flush_work+0x20/0x20\n[   44.178257 ]  ? lock_release+0x13c/0x8f0\n[   44.178550 ]  ? __kasan_check_write+0x14/0x20\n[   44.178872 ]  ? do_raw_spin_lock+0x148/0x360\n[   44.179187 ]  ? read_lock_is_recursive+0x20/0x20\n[   44.179530 ]  ? __kasan_check_read+0x11/0x20\n[   44.179846 ]  ? do_raw_spin_unlock+0x55/0x900\n[   44.180168 ]  ? ____kasan_slab_free+0x116/0x140\n[   44.180505 ]  ? _raw_spin_unlock_irqrestore+0x41/0x60\n[   44.180878 ]  ? skb_queue_purge+0x1a3/0x1c0\n[   44.181189 ]  ? kfree+0x13e/0x290\n[   44.181438 ]  flush_work+0x17/0x20\n[   44.181695 ]  mISDN_freedchannel+0xe8/0x100\n[   44.182006 ]  isac_release+0x210/0x260 [mISDNipac]\n[   44.182366 ]  nj_release+0xf6/0x500 [netjet]\n[   44.182685 ]  nj_remove+0x48/0x70 [netjet]\n[   44.182989 ]  pci_device_remove+0xa9/0x250"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-12-10T07:11:54.844Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b"
            },
            {
              "url": "https://git.kernel.org/stable/c/ef269a8808cb1759245a98a7fe16fceaebad894c"
            },
            {
              "url": "https://git.kernel.org/stable/c/37e4f57b22cc5ebb3f80cf0f74fdeb487f082367"
            },
            {
              "url": "https://git.kernel.org/stable/c/a5b34409d3fc52114c828be4adbc30744fa3258b"
            },
            {
              "url": "https://git.kernel.org/stable/c/4054b869dc263228d30a4755800b78f0f2ba0c89"
            },
            {
              "url": "https://git.kernel.org/stable/c/9f591cbdbed3d7822b2bdba89b34a6d7b434317d"
            },
            {
              "url": "https://git.kernel.org/stable/c/f5966ba53013149bcf94e1536644a958dd00a026"
            },
            {
              "url": "https://git.kernel.org/stable/c/6510e80a0b81b5d814e3aea6297ba42f5e76f73c"
            }
          ],
          "title": "isdn: mISDN: Fix sleeping function called from invalid context",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47468",
        "datePublished": "2024-05-22T06:23:26.982Z",
        "dateReserved": "2024-05-22T06:20:56.199Z",
        "dateUpdated": "2025-12-10T07:11:54.844Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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