{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-47269", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47269", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2024-05-21T14:19:59.207Z", "updatedAt": "2026-05-11T13:51:14.532Z", "importedAt": "2026-10-24T01:56:36.661Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "usb: dwc3: ep0: fix NULL pointer exception", "summary": "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 ]---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e", "status": "affected", "versionType": "git", "lessThan": "96b74a99d360235c24052f1d060e64ac53f43528" }, { "version": "6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e", "status": "affected", "versionType": "git", "lessThan": "60156089f07e724e4dc8483702d5e1ede4522749" }, { "version": "6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e", "status": "affected", "versionType": "git", "lessThan": "990dc90750772622d44ca2ea6652c521e6f67e16" }, { "version": "6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e", "status": "affected", "versionType": "git", "lessThan": "bd551e7c85939de2182010273450bfa78c3742fc" }, { "version": "6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e", "status": "affected", "versionType": "git", "lessThan": "366369b89bedd59b1425386e8d4a18a466e420e4" }, { "version": "6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e", "status": "affected", "versionType": "git", "lessThan": "470403639114895e2697c766fbe17be8d0e9b67a" }, { "version": "6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e", "status": "affected", "versionType": "git", "lessThan": "788755756dd4a6aba1de479fec20b0fa600e7f19" }, { "version": "6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e", "status": "affected", "versionType": "git", "lessThan": "d00889080ab60051627dab1d85831cd9db750e2a" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.10", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.10" }, { "version": "4.4.273", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.4.*" }, { "version": "4.9.273", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.237", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.195", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.126", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.44", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.12.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.12.*" }, { "version": "5.13", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }