CVE-2021-47269 (GCVE-0-2021-47269)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:19 – Updated: 2025-12-18 11:36
VLAI?
Title
usb: dwc3: ep0: fix NULL pointer exception
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: ep0: fix NULL pointer exception There is no validation of the index from dwc3_wIndex_to_dep() and we might be referring a non-existing ep and trigger a NULL pointer exception. In certain configurations we might use fewer eps and the index might wrongly indicate a larger ep index than existing. By adding this validation from the patch we can actually report a wrong index back to the caller. In our usecase we are using a composite device on an older kernel, but upstream might use this fix also. Unfortunately, I cannot describe the hardware for others to reproduce the issue as it is a proprietary implementation. [ 82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4 [ 82.966891] Mem abort info: [ 82.969663] ESR = 0x96000006 [ 82.972703] Exception class = DABT (current EL), IL = 32 bits [ 82.978603] SET = 0, FnV = 0 [ 82.981642] EA = 0, S1PTW = 0 [ 82.984765] Data abort info: [ 82.987631] ISV = 0, ISS = 0x00000006 [ 82.991449] CM = 0, WnR = 0 [ 82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc [ 83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000 [ 83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP [ 83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c) [ 83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1 [ 83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO) [ 83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c [ 83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94 ... [ 83.141788] Call trace: [ 83.144227] dwc3_ep0_handle_feature+0x414/0x43c [ 83.148823] dwc3_ep0_interrupt+0x3b4/0xc94 [ 83.181546] ---[ end trace aac6b5267d84c32f ]---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 96b74a99d360235c24052f1d060e64ac53f43528 (git)
Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 60156089f07e724e4dc8483702d5e1ede4522749 (git)
Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 990dc90750772622d44ca2ea6652c521e6f67e16 (git)
Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < bd551e7c85939de2182010273450bfa78c3742fc (git)
Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 366369b89bedd59b1425386e8d4a18a466e420e4 (git)
Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 470403639114895e2697c766fbe17be8d0e9b67a (git)
Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 788755756dd4a6aba1de479fec20b0fa600e7f19 (git)
Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < d00889080ab60051627dab1d85831cd9db750e2a (git)
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    Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 4.4.273 , ≤ 4.4.* (semver)
Unaffected: 4.9.273 , ≤ 4.9.* (semver)
Unaffected: 4.14.237 , ≤ 4.14.* (semver)
Unaffected: 4.19.195 , ≤ 4.19.* (semver)
Unaffected: 5.4.126 , ≤ 5.4.* (semver)
Unaffected: 5.10.44 , ≤ 5.10.* (semver)
Unaffected: 5.12.11 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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\"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e\", \"lessThan\": \"788755756dd4a6aba1de479fec20b0fa600e7f19\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e\", \"lessThan\": \"d00889080ab60051627dab1d85831cd9db750e2a\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/usb/dwc3/ep0.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.273\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.273\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.237\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.195\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.126\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.44\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/usb/dwc3/ep0.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/96b74a99d360235c24052f1d060e64ac53f43528\"}, {\"url\": \"https://git.kernel.org/stable/c/60156089f07e724e4dc8483702d5e1ede4522749\"}, {\"url\": \"https://git.kernel.org/stable/c/990dc90750772622d44ca2ea6652c521e6f67e16\"}, {\"url\": \"https://git.kernel.org/stable/c/bd551e7c85939de2182010273450bfa78c3742fc\"}, {\"url\": \"https://git.kernel.org/stable/c/366369b89bedd59b1425386e8d4a18a466e420e4\"}, {\"url\": \"https://git.kernel.org/stable/c/470403639114895e2697c766fbe17be8d0e9b67a\"}, {\"url\": \"https://git.kernel.org/stable/c/788755756dd4a6aba1de479fec20b0fa600e7f19\"}, {\"url\": \"https://git.kernel.org/stable/c/d00889080ab60051627dab1d85831cd9db750e2a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: dwc3: ep0: fix NULL pointer exception\\n\\nThere is no validation of the index from dwc3_wIndex_to_dep() and we might\\nbe referring a non-existing ep and trigger a NULL pointer exception. In\\ncertain configurations we might use fewer eps and the index might wrongly\\nindicate a larger ep index than existing.\\n\\nBy adding this validation from the patch we can actually report a wrong\\nindex back to the caller.\\n\\nIn our usecase we are using a composite device on an older kernel, but\\nupstream might use this fix also. Unfortunately, I cannot describe the\\nhardware for others to reproduce the issue as it is a proprietary\\nimplementation.\\n\\n[   82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4\\n[   82.966891] Mem abort info:\\n[   82.969663]   ESR = 0x96000006\\n[   82.972703]   Exception class = DABT (current EL), IL = 32 bits\\n[   82.978603]   SET = 0, FnV = 0\\n[   82.981642]   EA = 0, S1PTW = 0\\n[   82.984765] Data abort info:\\n[   82.987631]   ISV = 0, ISS = 0x00000006\\n[   82.991449]   CM = 0, WnR = 0\\n[   82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc\\n[   83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000\\n[   83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP\\n[   83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c)\\n[   83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1\\n[   83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO)\\n[   83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c\\n[   83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94\\n\\n...\\n\\n[   83.141788] Call trace:\\n[   83.144227]  dwc3_ep0_handle_feature+0x414/0x43c\\n[   83.148823]  dwc3_ep0_interrupt+0x3b4/0xc94\\n[   83.181546] ---[ end trace aac6b5267d84c32f ]---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.273\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.273\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.237\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.195\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.126\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.44\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.11\", \"versionStartIncluding\": \"3.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"3.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-18T11:36:23.900Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47269\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-18T11:36:23.900Z\", \"dateReserved\": \"2024-05-21T13:27:52.127Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:19:59.207Z\", \"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.