{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47468", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-22T06:20:56.199Z", "datePublished": "2024-05-22T06:23:26.982Z", "dateUpdated": "2025-12-18T11:37:36.332Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-18T11:37:36.332Z"}, "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->isac.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): [<0000000000000000>] 0x0\n[ 44.170627 ] hardirqs last disabled at (0): [<ffffffff814209ed>] copy_process+0x132d/0x3e00\n[ 44.171240 ] softirqs last enabled at (0): [<ffffffff81420a1a>] copy_process+0x135a/0x3e00\n[ 44.171852 ] softirqs last disabled at (0): [<0000000000000000>] 0x0\n[ 44.172318 ] Preemption disabled at:\n[ 44.172320 ] [<ffffffffa009b0a9>] 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"}], "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/netjet.c"], "versions": [{"version": "a900845e56617edc005fd8f35bfd5a407aaf96c8", "lessThan": "6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b", "status": "affected", "versionType": "git"}, {"version": "a900845e56617edc005fd8f35bfd5a407aaf96c8", "lessThan": "ef269a8808cb1759245a98a7fe16fceaebad894c", "status": "affected", "versionType": "git"}, {"version": "a900845e56617edc005fd8f35bfd5a407aaf96c8", "lessThan": "37e4f57b22cc5ebb3f80cf0f74fdeb487f082367", "status": "affected", "versionType": "git"}, {"version": "a900845e56617edc005fd8f35bfd5a407aaf96c8", "lessThan": "a5b34409d3fc52114c828be4adbc30744fa3258b", "status": "affected", "versionType": "git"}, {"version": "a900845e56617edc005fd8f35bfd5a407aaf96c8", "lessThan": "4054b869dc263228d30a4755800b78f0f2ba0c89", "status": "affected", "versionType": "git"}, {"version": "a900845e56617edc005fd8f35bfd5a407aaf96c8", "lessThan": 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{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/ef269a8808cb1759245a98a7fe16fceaebad894c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/37e4f57b22cc5ebb3f80cf0f74fdeb487f082367", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/a5b34409d3fc52114c828be4adbc30744fa3258b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/4054b869dc263228d30a4755800b78f0f2ba0c89", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9f591cbdbed3d7822b2bdba89b34a6d7b434317d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/f5966ba53013149bcf94e1536644a958dd00a026", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/6510e80a0b81b5d814e3aea6297ba42f5e76f73c", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:39:59.530Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47468", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:36:08.496744Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:13.277Z"}}], "cna": {"title": "isdn: mISDN: Fix sleeping function called from invalid context", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b", "versionType": "git"}, {"status": "affected", "version": 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{"status": "unaffected", "version": "5.15", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/isdn/hardware/mISDN/netjet.c"], "defaultStatus": "affected"}], "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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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->isac.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): [<0000000000000000>] 0x0\n[ 44.170627 ] hardirqs last disabled at (0): [<ffffffff814209ed>] copy_process+0x132d/0x3e00\n[ 44.171240 ] softirqs last enabled at (0): [<ffffffff81420a1a>] copy_process+0x135a/0x3e00\n[ 44.171852 ] softirqs last disabled at (0): [<0000000000000000>] 0x0\n[ 44.172318 ] Preemption disabled at:\n[ 44.172320 ] [<ffffffffa009b0a9>] 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"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.4.290"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.9.288"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.14.253"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.214"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.156"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.76"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.14.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-10T07:11:54.844Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47468", "state": "PUBLISHED", "dateUpdated": "2025-12-10T07:11:54.844Z", "dateReserved": "2024-05-22T06:20:56.199Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-22T06:23:26.982Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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El controlador puede llamar a la funci\u00f3n card-&gt;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): [&lt;0000000000000000&gt;] 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): [&lt;00000000000000000&gt;] 0x0 [ 44.172318 ] Preferencia deshabilitada en: [ 44.172320 ] ffa009b0a9&gt;] 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": "2025-09-24T18:40:47.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "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", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-05-22T07:15:11.603", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/37e4f57b22cc5ebb3f80cf0f74fdeb487f082367"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4054b869dc263228d30a4755800b78f0f2ba0c89"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6510e80a0b81b5d814e3aea6297ba42f5e76f73c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9f591cbdbed3d7822b2bdba89b34a6d7b434317d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a5b34409d3fc52114c828be4adbc30744fa3258b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef269a8808cb1759245a98a7fe16fceaebad894c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f5966ba53013149bcf94e1536644a958dd00a026"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/37e4f57b22cc5ebb3f80cf0f74fdeb487f082367"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4054b869dc263228d30a4755800b78f0f2ba0c89"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6510e80a0b81b5d814e3aea6297ba42f5e76f73c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9f591cbdbed3d7822b2bdba89b34a6d7b434317d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a5b34409d3fc52114c828be4adbc30744fa3258b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef269a8808cb1759245a98a7fe16fceaebad894c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f5966ba53013149bcf94e1536644a958dd00a026"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:5102", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:5101", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.16.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:5692", "cpe": "cpe:/o:redhat:rhel_aus:8.6", "package": "kernel-0:4.18.0-372.119.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2024-08-21T00:00:00Z"}, {"advisory": "RHSA-2024:5692", "cpe": "cpe:/o:redhat:rhel_tus:8.6", "package": "kernel-0:4.18.0-372.119.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2024-08-21T00:00:00Z"}, {"advisory": "RHSA-2024:5692", "cpe": "cpe:/o:redhat:rhel_e4s:8.6", "package": "kernel-0:4.18.0-372.119.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2024-08-21T00:00:00Z"}, {"advisory": "RHSA-2024:6993", "cpe": "cpe:/o:redhat:rhel_eus:8.8", "package": "kernel-0:4.18.0-477.74.1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-09-24T00:00:00Z"}], "bugzilla": {"description": "kernel: isdn: mISDN: Fix sleeping function called from invalid context", "id": "2282887", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282887"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nisdn: mISDN: Fix sleeping function called from invalid context\nThe driver can call card->isac.release() function from an atomic\ncontext.\nFix this by calling this function after releasing the lock.\nThe following log reveals it:\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): [<0000000000000000>] 0x0\n[ 44.170627 ] hardirqs last disabled at (0): [<ffffffff814209ed>] copy_process+0x132d/0x3e00\n[ 44.171240 ] softirqs last enabled at (0): [<ffffffff81420a1a>] copy_process+0x135a/0x3e00\n[ 44.171852 ] softirqs last disabled at (0): [<0000000000000000>] 0x0\n[ 44.172318 ] Preemption disabled at:\n[ 44.172320 ] [<ffffffffa009b0a9>] 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"], "name": "CVE-2021-47468", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47468\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47468\nhttps://lore.kernel.org/linux-cve-announce/2024052227-CVE-2021-47468-6c1b@gregkh/T"], "threat_severity": "Low"}

{}