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

Vulnerability from cvelistv5 – Published: 2024-05-22 06:23 – Updated: 2025-12-18 11:37
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.
Assigner
References
Impacted products
Vendor Product Version
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)
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    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)
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\"versions\": [{\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"6f95c97e0f9d6eb39c3f2cb45e8fa4268d1b372b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"ef269a8808cb1759245a98a7fe16fceaebad894c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"37e4f57b22cc5ebb3f80cf0f74fdeb487f082367\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"a5b34409d3fc52114c828be4adbc30744fa3258b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"4054b869dc263228d30a4755800b78f0f2ba0c89\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": 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\"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.214\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.156\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"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-\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\"}], \"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\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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.



Detection rules are retrieved from Rulezet.