CVE-2026-64427

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This is reproducible with\nuhid by emulating a Logitech receiver with a padding-only DJ short output\nreport:\n\n BUG: KASAN: null-ptr-deref in logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n Read of size 4 at addr 0000000000000028 by task kworker/4:1/129\n ...\n Call Trace:\n logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n hid_device_probe+0x329/0x3f0 [hid]\n really_probe+0x162/0x570\n __device_attach+0x137/0x2c0\n bus_probe_device+0x38/0xc0\n device_add+0xa56/0xce0\n hid_add_device+0x19c/0x280 [hid]\n uhid_device_add_worker+0x2c/0xb0 [uhid]\n\nReject the zero-field report before printing the field report_count."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-logitech-dj.c"], "versions": [{"version": "7754ade02d0fb1caf20392baf4e02937378fd136", "lessThan": "f3790a6af9c7f47d454225cab9dc145270e48f62", "status": "affected", "versionType": "git"}, {"version": "2ed9638cfbf9d49bdef9b0f5ee547236c2c2f500", "lessThan": "1215febd644c3e16f77e0f1799d89544dd57a754", "status": "affected", "versionType": "git"}, {"version": "eeb5ad388595ca2b6624689198a057847f3a3e19", "lessThan": "6f7f22a8d244c2e586b8eb61c7585784b62aea01", "status": "affected", "versionType": "git"}, {"version": "968e84f5c0dca4960580d174500e4bbf0c45dc15", "lessThan": "95b3f23d632490b5eb285b9fcf7284f2ac8f9872", "status": "affected", "versionType": "git"}, {"version": "ce2a731c179df8869e1969a1b2b5b9e4e1c25f8b", "lessThan": "80c1e18473f63fd7c6a2bc9ad6f3d0a6cc4fb500", "status": "affected", "versionType": "git"}, {"version": "bc3bba4656ad280267ea78cf845ab6b1d95b9fcd", "lessThan": "2b70bebc709489d29a31ac2935aeffb8d5228395", "status": "affected", "versionType": "git"}, {"version": "b6a57912854e7ea36f3b270032661140cc4209cd", "lessThan": "7a89ad762fad53d56b7002d7ffc923a4b7f4006f", "status": "affected", "versionType": "git"}, {"version": "b6a57912854e7ea36f3b270032661140cc4209cd", "lessThan": "590cc4d782487632a52f37c2171bee1eeea29627", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-logitech-dj.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f3790a6af9c7f47d454225cab9dc145270e48f62"}, {"url": "https://git.kernel.org/stable/c/1215febd644c3e16f77e0f1799d89544dd57a754"}, {"url": "https://git.kernel.org/stable/c/6f7f22a8d244c2e586b8eb61c7585784b62aea01"}, {"url": "https://git.kernel.org/stable/c/95b3f23d632490b5eb285b9fcf7284f2ac8f9872"}, {"url": "https://git.kernel.org/stable/c/80c1e18473f63fd7c6a2bc9ad6f3d0a6cc4fb500"}, {"url": "https://git.kernel.org/stable/c/2b70bebc709489d29a31ac2935aeffb8d5228395"}, {"url": "https://git.kernel.org/stable/c/7a89ad762fad53d56b7002d7ffc923a4b7f4006f"}, {"url": "https://git.kernel.org/stable/c/590cc4d782487632a52f37c2171bee1eeea29627"}], "title": "HID: logitech-dj: Fix maxfield check in DJ short report validation", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64427", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:38:26.994662Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:44:51.666Z"}}]}}

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This is reproducible with\nuhid by emulating a Logitech receiver with a padding-only DJ short output\nreport:\n\n BUG: KASAN: null-ptr-deref in logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n Read of size 4 at addr 0000000000000028 by task kworker/4:1/129\n ...\n Call Trace:\n logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n hid_device_probe+0x329/0x3f0 [hid]\n really_probe+0x162/0x570\n __device_attach+0x137/0x2c0\n bus_probe_device+0x38/0xc0\n device_add+0xa56/0xce0\n hid_add_device+0x19c/0x280 [hid]\n uhid_device_add_worker+0x2c/0xb0 [uhid]\n\nReject the zero-field report before printing the field report_count."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.4", "versionStartIncluding": "7.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "7.1"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:28:13.596Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64427", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:44:51.666Z", "dateReserved": "2026-07-19T15:36:31.787Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-25T08:51:04.686Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/hid/hid-logitech-dj.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f3790a6af9c7f47d454225cab9dc145270e48f62", "status": "affected", "version": "7754ade02d0fb1caf20392baf4e02937378fd136", "versionType": "git"}, {"lessThan": "1215febd644c3e16f77e0f1799d89544dd57a754", "status": "affected", "version": "2ed9638cfbf9d49bdef9b0f5ee547236c2c2f500", "versionType": "git"}, {"lessThan": "6f7f22a8d244c2e586b8eb61c7585784b62aea01", "status": "affected", "version": "eeb5ad388595ca2b6624689198a057847f3a3e19", "versionType": "git"}, {"lessThan": "95b3f23d632490b5eb285b9fcf7284f2ac8f9872", "status": "affected", "version": "968e84f5c0dca4960580d174500e4bbf0c45dc15", "versionType": "git"}, {"lessThan": "80c1e18473f63fd7c6a2bc9ad6f3d0a6cc4fb500", "status": "affected", "version": "ce2a731c179df8869e1969a1b2b5b9e4e1c25f8b", "versionType": "git"}, {"lessThan": "2b70bebc709489d29a31ac2935aeffb8d5228395", "status": "affected", "version": "bc3bba4656ad280267ea78cf845ab6b1d95b9fcd", "versionType": "git"}, {"lessThan": "7a89ad762fad53d56b7002d7ffc923a4b7f4006f", "status": "affected", "version": "b6a57912854e7ea36f3b270032661140cc4209cd", "versionType": "git"}, {"lessThan": "590cc4d782487632a52f37c2171bee1eeea29627", "status": "affected", "version": "b6a57912854e7ea36f3b270032661140cc4209cd", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/hid/hid-logitech-dj.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7D22B17B-4F96-43BE-835F-3A80228838B0", "versionEndExcluding": "7.1.4", "versionStartIncluding": "7.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:*", "matchCriteriaId": "5E8B9085-7ADB-4A05-89EF-12949B6A0509", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:*", "matchCriteriaId": "1FC0D50D-9D58-4947-A197-A5A3FF07E7E3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: logitech-dj: Fix maxfield check in DJ short report validation\n\nCommit b6a57912854e (\"HID: logitech-dj: Prevent REPORT_ID_DJ_SHORT\nrelated user initiated OOB write\") added validation for the DJ short\noutput report, but the error path dereferences rep->field[0] even when\nrep->maxfield is zero.\n\nCommit 8b9a097eb2fc (\"HID: logitech-dj: fix wrong detection of bad\nDJ_SHORT output report\") made the check conditional on rep being present,\nbut a crafted descriptor can still create report ID 0x20 with only padding\noutput items. hid-core registers the report, ignores the padding field,\nand leaves rep->maxfield as zero.\n\nIn that case the validation enters the rep->maxfield < 1 branch and then\ndereferences rep->field[0]->report_count while printing the error message,\ncausing a NULL pointer dereference during probe. This is reproducible with\nuhid by emulating a Logitech receiver with a padding-only DJ short output\nreport:\n\n BUG: KASAN: null-ptr-deref in logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n Read of size 4 at addr 0000000000000028 by task kworker/4:1/129\n ...\n Call Trace:\n logi_dj_probe+0xb1/0x754 [hid_logitech_dj]\n hid_device_probe+0x329/0x3f0 [hid]\n really_probe+0x162/0x570\n __device_attach+0x137/0x2c0\n bus_probe_device+0x38/0xc0\n device_add+0xa56/0xce0\n hid_add_device+0x19c/0x280 [hid]\n uhid_device_add_worker+0x2c/0xb0 [uhid]\n\nReject the zero-field report before printing the field report_count."}], "id": "CVE-2026-64427", "lastModified": "2026-11-06T17:18:54.190", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64427", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:38:26.994662Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:26.843", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1215febd644c3e16f77e0f1799d89544dd57a754"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2b70bebc709489d29a31ac2935aeffb8d5228395"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/590cc4d782487632a52f37c2171bee1eeea29627"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f7f22a8d244c2e586b8eb61c7585784b62aea01"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a89ad762fad53d56b7002d7ffc923a4b7f4006f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/80c1e18473f63fd7c6a2bc9ad6f3d0a6cc4fb500"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95b3f23d632490b5eb285b9fcf7284f2ac8f9872"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f3790a6af9c7f47d454225cab9dc145270e48f62"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: HID: logitech-dj: Fix maxfield check in DJ short report validation", "id": "2507294", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507294"}, "csaw": false, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's Human Interface Device (HID) Logitech DJ driver. This vulnerability arises from an incorrect check in the DJ short report validation, where a specially crafted device descriptor can lead to a null pointer dereference during device initialization. Successful exploitation of this flaw could allow a local attacker to cause a system crash, resulting in a denial of service (DoS)."], "name": "CVE-2026-64427", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"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": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64427\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64427\nhttps://lore.kernel.org/linux-cve-announce/2026072536-CVE-2026-64427-6a9f@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a57912854e7ea36f3b270032661140cc4209cd,7a89ad762fad53d56b7002d7ffc923a4b7f4006f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a57912854e7ea36f3b270032661140cc4209cd,590cc4d782487632a52f37c2171bee1eeea29627)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-25T19:45:03.152103+00:00", "updated": "2026-09-04T18:00:04.949910+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}