CVE-2026-64376

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This may leave the reference count of the embedded struct\ndevice unbalanced, resulting in a refcount leak.\n\nThe issue was identified by a static analysis tool I developed and\nconfirmed by manual review. Fix this by using put_device(fw_dev) in the\nfailure path and letting fw_dev_release() handle the final cleanup,\ninstead of freeing the instance directly from the error path."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/base/firmware_loader/sysfs_upload.c"], "versions": [{"version": "97730bbb242cde22b7140acd202ffd88823886c9", "lessThan": "517676ec7dfca064e08f94007a4abd21969de0a0", "status": "affected", "versionType": "git"}, {"version": "97730bbb242cde22b7140acd202ffd88823886c9", "lessThan": "46d403da376a8b7c1187193294953816e1a8d7fe", "status": "affected", "versionType": "git"}, {"version": "97730bbb242cde22b7140acd202ffd88823886c9", "lessThan": "2619b47a0c8114eef980a56ade7e3ef4b58eb384", "status": "affected", "versionType": "git"}, {"version": "97730bbb242cde22b7140acd202ffd88823886c9", "lessThan": "92f41769e5fd16bcd9ba97500d0517332e0a5b45", "status": "affected", "versionType": "git"}, {"version": "97730bbb242cde22b7140acd202ffd88823886c9", "lessThan": "15432f19562fdb9199cce6d9fc24db12c71ed574", "status": "affected", "versionType": "git"}, {"version": "97730bbb242cde22b7140acd202ffd88823886c9", "lessThan": "896df22ee57648b0c505bd76ddbc6b2341834696", "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/base/firmware_loader/sysfs_upload.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "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": "5.19", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/517676ec7dfca064e08f94007a4abd21969de0a0"}, {"url": "https://git.kernel.org/stable/c/46d403da376a8b7c1187193294953816e1a8d7fe"}, {"url": "https://git.kernel.org/stable/c/2619b47a0c8114eef980a56ade7e3ef4b58eb384"}, {"url": "https://git.kernel.org/stable/c/92f41769e5fd16bcd9ba97500d0517332e0a5b45"}, {"url": "https://git.kernel.org/stable/c/15432f19562fdb9199cce6d9fc24db12c71ed574"}, {"url": "https://git.kernel.org/stable/c/896df22ee57648b0c505bd76ddbc6b2341834696"}], "title": "firmware_loader: fix device reference leak in firmware_upload_register()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64376", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:37:42.844093Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:44:50.323Z"}}]}}

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This may leave the reference count of the embedded struct\ndevice unbalanced, resulting in a refcount leak.\n\nThe issue was identified by a static analysis tool I developed and\nconfirmed by manual review. Fix this by using put_device(fw_dev) in the\nfailure path and letting fw_dev_release() handle the final cleanup,\ninstead of freeing the instance directly from the error path."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.96", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.39", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.4", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "5.19"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:54:27.297Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64376", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:44:50.323Z", "dateReserved": "2026-07-19T15:36:31.784Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-25T08:50:27.577Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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This may leave the reference count of the embedded struct\ndevice unbalanced, resulting in a refcount leak.\n\nThe issue was identified by a static analysis tool I developed and\nconfirmed by manual review. Fix this by using put_device(fw_dev) in the\nfailure path and letting fw_dev_release() handle the final cleanup,\ninstead of freeing the instance directly from the error path."}], "id": "CVE-2026-64376", "lastModified": "2026-11-06T17:18:52.997", "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-2026-64376", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:37:42.844093Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:20.717", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/15432f19562fdb9199cce6d9fc24db12c71ed574"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2619b47a0c8114eef980a56ade7e3ef4b58eb384"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/46d403da376a8b7c1187193294953816e1a8d7fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/517676ec7dfca064e08f94007a4abd21969de0a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/896df22ee57648b0c505bd76ddbc6b2341834696"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/92f41769e5fd16bcd9ba97500d0517332e0a5b45"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: firmware_loader: fix device reference leak in firmware_upload_register()", "id": "2507205", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507205"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's firmware loader component. This vulnerability occurs in the `firmware_upload_register()` function when an allocation failure happens after a device instance is created. The system fails to properly release a device reference, leading to an unbalanced reference count. This can result in a resource leak within the kernel."], "name": "CVE-2026-64376", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "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-2026-64376\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64376\nhttps://lore.kernel.org/linux-cve-announce/2026072524-CVE-2026-64376-efcf@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[97730bbb242cde22b7140acd202ffd88823886c9,517676ec7dfca064e08f94007a4abd21969de0a0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[97730bbb242cde22b7140acd202ffd88823886c9,46d403da376a8b7c1187193294953816e1a8d7fe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[97730bbb242cde22b7140acd202ffd88823886c9,2619b47a0c8114eef980a56ade7e3ef4b58eb384)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[97730bbb242cde22b7140acd202ffd88823886c9,92f41769e5fd16bcd9ba97500d0517332e0a5b45)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[97730bbb242cde22b7140acd202ffd88823886c9,15432f19562fdb9199cce6d9fc24db12c71ed574)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[97730bbb242cde22b7140acd202ffd88823886c9,896df22ee57648b0c505bd76ddbc6b2341834696)"}}], "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": "semver", "value": "5.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-07-25T15:30:07.765742+00:00", "updated": "2026-09-08T16:30:07.586669+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}