CVE-2026-89739

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89739", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.761Z", "datePublished": "2026-09-11T19:46:46.545Z", "dateUpdated": "2026-10-21T12:48:32.502Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:48:32.502Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition\n\nIn dwc3_gadget_init_endpoint, &dep->nostream_work is bound with\ndwc3_nostream_work, and dwc3_gadget_endpoint_stream_event can queue\nthis delayed work on system_percpu_wq when a DEPEVT_STREAM_NOSTREAM\nevent is received.\n\nIf we remove the gadget, dwc3_gadget_free_endpoints makes cleanup and\nthe memory allocated for dep with kzalloc() is released by kfree(dep),\nwhile the delayed work mentioned above may still be pending or\nrunning. The sequence of operations that may lead to a UAF bug is as\nfollows:\n\nCPU0 CPU1\n\n | dwc3_thread_interrupt\n | dwc3_endpoint_interrupt\n | dwc3_gadget_endpoint_stream_event\n | queue_delayed_work(system_percpu_wq,\n | &dep->nostream_work)\ndwc3_gadget_free_endpoints |\ndwc3_free_trb_pool(dep) |\nlist_del(&dep->endpoint.ep_list) |\ndwc3_debugfs_remove_endpoint_dir(dep) |\nkfree(dep) |\n// dep is freed |\n | dwc3_nostream_work\n | // use dep (use-after-free)\n\nFix it by canceling the delayed work before kfree(dep) in\ndwc3_gadget_free_endpoints."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/dwc3/gadget.c"], "versions": [{"version": "f41ffcd656615754741f190afca00ca3c4bde9f1", "lessThan": "5f359265f616873edf32db418bd1513fdae3ddec", "status": "affected", "versionType": "git"}, {"version": "dcfe437492e27d54f3ac491aed024da760f5c43c", "lessThan": "448e95c0f3eaa8d99f16ccae92ab94545f14413b", "status": "affected", "versionType": "git"}, {"version": "dcfe437492e27d54f3ac491aed024da760f5c43c", "lessThan": "93e08b13a7a30e4e78556d993720e0bc36231ec7", "status": "affected", "versionType": "git"}, {"version": "dcfe437492e27d54f3ac491aed024da760f5c43c", "lessThan": "9c855832790cd488d87de1885974f4c37cfe7358", "status": "affected", "versionType": "git"}, {"version": "5212f8f452b87318e735ca304728f6f8fb55ff7b", "status": "affected", "versionType": "git"}, {"version": "6.6.160", "lessThan": "6.7", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/dwc3/gadget.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.14", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.160"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5f359265f616873edf32db418bd1513fdae3ddec"}, {"url": "https://git.kernel.org/stable/c/448e95c0f3eaa8d99f16ccae92ab94545f14413b"}, {"url": "https://git.kernel.org/stable/c/93e08b13a7a30e4e78556d993720e0bc36231ec7"}, {"url": "https://git.kernel.org/stable/c/9c855832790cd488d87de1885974f4c37cfe7358"}], "title": "usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/usb/dwc3/gadget.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5f359265f616873edf32db418bd1513fdae3ddec", "status": "affected", "version": "f41ffcd656615754741f190afca00ca3c4bde9f1", "versionType": "git"}, {"lessThan": "448e95c0f3eaa8d99f16ccae92ab94545f14413b", "status": "affected", "version": "dcfe437492e27d54f3ac491aed024da760f5c43c", "versionType": "git"}, {"lessThan": "93e08b13a7a30e4e78556d993720e0bc36231ec7", "status": "affected", "version": "dcfe437492e27d54f3ac491aed024da760f5c43c", "versionType": "git"}, {"lessThan": "9c855832790cd488d87de1885974f4c37cfe7358", "status": "affected", "version": "dcfe437492e27d54f3ac491aed024da760f5c43c", "versionType": "git"}, {"status": "affected", "version": "5212f8f452b87318e735ca304728f6f8fb55ff7b", "versionType": "git"}, {"lessThan": "6.7", "status": "affected", "version": "6.6.160", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/usb/dwc3/gadget.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition\n\nIn dwc3_gadget_init_endpoint, &dep->nostream_work is bound with\ndwc3_nostream_work, and dwc3_gadget_endpoint_stream_event can queue\nthis delayed work on system_percpu_wq when a DEPEVT_STREAM_NOSTREAM\nevent is received.\n\nIf we remove the gadget, dwc3_gadget_free_endpoints makes cleanup and\nthe memory allocated for dep with kzalloc() is released by kfree(dep),\nwhile the delayed work mentioned above may still be pending or\nrunning. The sequence of operations that may lead to a UAF bug is as\nfollows:\n\nCPU0 CPU1\n\n | dwc3_thread_interrupt\n | dwc3_endpoint_interrupt\n | dwc3_gadget_endpoint_stream_event\n | queue_delayed_work(system_percpu_wq,\n | &dep->nostream_work)\ndwc3_gadget_free_endpoints |\ndwc3_free_trb_pool(dep) |\nlist_del(&dep->endpoint.ep_list) |\ndwc3_debugfs_remove_endpoint_dir(dep) |\nkfree(dep) |\n// dep is freed |\n | dwc3_nostream_work\n | // use dep (use-after-free)\n\nFix it by canceling the delayed work before kfree(dep) in\ndwc3_gadget_free_endpoints."}], "id": "CVE-2026-89739", "lastModified": "2026-10-21T13:20:23.813", "metrics": {}, "published": "2026-09-11T20:20:04.480", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/448e95c0f3eaa8d99f16ccae92ab94545f14413b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5f359265f616873edf32db418bd1513fdae3ddec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93e08b13a7a30e4e78556d993720e0bc36231ec7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c855832790cd488d87de1885974f4c37cfe7358"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition", "id": "2532363", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532363"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nusb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition\nIn dwc3_gadget_init_endpoint, &dep->nostream_work is bound with\ndwc3_nostream_work, and dwc3_gadget_endpoint_stream_event can queue\nthis delayed work on system_percpu_wq when a DEPEVT_STREAM_NOSTREAM\nevent is received.\nIf we remove the gadget, dwc3_gadget_free_endpoints makes cleanup and\nthe memory allocated for dep with kzalloc() is released by kfree(dep),\nwhile the delayed work mentioned above may still be pending or\nrunning. The sequence of operations that may lead to a UAF bug is as\nfollows:\nCPU0 CPU1\n| dwc3_thread_interrupt\n| dwc3_endpoint_interrupt\n| dwc3_gadget_endpoint_stream_event\n| queue_delayed_work(system_percpu_wq,\n| &dep->nostream_work)\ndwc3_gadget_free_endpoints |\ndwc3_free_trb_pool(dep) |\nlist_del(&dep->endpoint.ep_list) |\ndwc3_debugfs_remove_endpoint_dir(dep) |\nkfree(dep) |\n// dep is freed |\n| dwc3_nostream_work\n| // use dep (use-after-free)\nFix it by canceling the delayed work before kfree(dep) in\ndwc3_gadget_free_endpoints.", "A flaw was found in the Linux kernel's USB dwc3 gadget driver. A race condition exists where a delayed operation might try to access memory that has already been freed. This can lead to a use-after-free vulnerability, which a local attacker could potentially exploit to cause a system crash (denial of service) or gain elevated privileges."], "name": "CVE-2026-89739", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel-rt", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89739\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89739\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89739.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dcfe437492e27d54f3ac491aed024da760f5c43c,448e95c0f3eaa8d99f16ccae92ab94545f14413b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dcfe437492e27d54f3ac491aed024da760f5c43c,93e08b13a7a30e4e78556d993720e0bc36231ec7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dcfe437492e27d54f3ac491aed024da760f5c43c,9c855832790cd488d87de1885974f4c37cfe7358)"}}], "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": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-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": "2026-09-12T08:45:11.057985+00:00", "updated": "2026-09-21T01:45:07.947000+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}