{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31728", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.134Z", "datePublished": "2026-05-01T14:14:28.231Z", "dateUpdated": "2026-05-01T14:14:28.231Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-01T14:14:28.231Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: u_ether: Fix race between gether_disconnect and eth_stop\n\nA race condition between gether_disconnect() and eth_stop() leads to a\nNULL pointer dereference. Specifically, if eth_stop() is triggered\nconcurrently while gether_disconnect() is tearing down the endpoints,\neth_stop() attempts to access the cleared endpoint descriptor, causing\nthe following NPE:\n\n Unable to handle kernel NULL pointer dereference\n Call trace:\n __dwc3_gadget_ep_enable+0x60/0x788\n dwc3_gadget_ep_enable+0x70/0xe4\n usb_ep_enable+0x60/0x15c\n eth_stop+0xb8/0x108\n\nBecause eth_stop() crashes while holding the dev->lock, the thread\nrunning gether_disconnect() fails to acquire the same lock and spins\nforever, resulting in a hardlockup:\n\n Core - Debugging Information for Hardlockup core(7)\n Call trace:\n queued_spin_lock_slowpath+0x94/0x488\n _raw_spin_lock+0x64/0x6c\n gether_disconnect+0x19c/0x1e8\n ncm_set_alt+0x68/0x1a0\n composite_setup+0x6a0/0xc50\n\nThe root cause is that the clearing of dev->port_usb in\ngether_disconnect() is delayed until the end of the function.\n\nMove the clearing of dev->port_usb to the very beginning of\ngether_disconnect() while holding dev->lock. This cuts off the link\nimmediately, ensuring eth_stop() will see dev->port_usb as NULL and\nsafely bail out."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/gadget/function/u_ether.c"], "versions": [{"version": "2b3d942c4878084a37991a65e66512c02b8fa2ad", "lessThan": "f02980594deef751e42133714aee25228f1494c6", "status": "affected", "versionType": "git"}, {"version": "2b3d942c4878084a37991a65e66512c02b8fa2ad", "lessThan": "e1e7a66584bf0aff3becb73c19fa31527889fc9e", "status": "affected", "versionType": "git"}, {"version": "2b3d942c4878084a37991a65e66512c02b8fa2ad", "lessThan": "a259ba0bce3b192c04334499690372a250f7d0b1", "status": "affected", "versionType": "git"}, {"version": "2b3d942c4878084a37991a65e66512c02b8fa2ad", "lessThan": "f6813c2b2ae78def76b69e0f9d72f80e4a1c4aca", "status": "affected", "versionType": "git"}, {"version": "2b3d942c4878084a37991a65e66512c02b8fa2ad", "lessThan": "bbb09bb89ffa571475f66daca9482b974cd29d6a", "status": "affected", "versionType": "git"}, {"version": "2b3d942c4878084a37991a65e66512c02b8fa2ad", "lessThan": "6ad77458637b78ec655e3da5f112c862e6690a9d", "status": "affected", "versionType": "git"}, {"version": "2b3d942c4878084a37991a65e66512c02b8fa2ad", "lessThan": "8ff689edfeceb5e3ec1623e09af2b2aa0f1098a8", "status": "affected", "versionType": "git"}, {"version": "2b3d942c4878084a37991a65e66512c02b8fa2ad", "lessThan": "e1eabb072c75681f78312c484ccfffb7430f206e", "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/usb/gadget/function/u_ether.c"], "versions": [{"version": "2.6.27", "status": "affected"}, {"version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.169", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "2.6.27", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.1.169"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f02980594deef751e42133714aee25228f1494c6"}, {"url": "https://git.kernel.org/stable/c/e1e7a66584bf0aff3becb73c19fa31527889fc9e"}, {"url": "https://git.kernel.org/stable/c/a259ba0bce3b192c04334499690372a250f7d0b1"}, {"url": "https://git.kernel.org/stable/c/f6813c2b2ae78def76b69e0f9d72f80e4a1c4aca"}, {"url": "https://git.kernel.org/stable/c/bbb09bb89ffa571475f66daca9482b974cd29d6a"}, {"url": "https://git.kernel.org/stable/c/6ad77458637b78ec655e3da5f112c862e6690a9d"}, {"url": "https://git.kernel.org/stable/c/8ff689edfeceb5e3ec1623e09af2b2aa0f1098a8"}, {"url": "https://git.kernel.org/stable/c/e1eabb072c75681f78312c484ccfffb7430f206e"}], "title": "usb: gadget: u_ether: Fix race between gether_disconnect and eth_stop", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: u_ether: Fix race between gether_disconnect and eth_stop\n\nA race condition between gether_disconnect() and eth_stop() leads to a\nNULL pointer dereference. Specifically, if eth_stop() is triggered\nconcurrently while gether_disconnect() is tearing down the endpoints,\neth_stop() attempts to access the cleared endpoint descriptor, causing\nthe following NPE:\n\n Unable to handle kernel NULL pointer dereference\n Call trace:\n __dwc3_gadget_ep_enable+0x60/0x788\n dwc3_gadget_ep_enable+0x70/0xe4\n usb_ep_enable+0x60/0x15c\n eth_stop+0xb8/0x108\n\nBecause eth_stop() crashes while holding the dev->lock, the thread\nrunning gether_disconnect() fails to acquire the same lock and spins\nforever, resulting in a hardlockup:\n\n Core - Debugging Information for Hardlockup core(7)\n Call trace:\n queued_spin_lock_slowpath+0x94/0x488\n _raw_spin_lock+0x64/0x6c\n gether_disconnect+0x19c/0x1e8\n ncm_set_alt+0x68/0x1a0\n composite_setup+0x6a0/0xc50\n\nThe root cause is that the clearing of dev->port_usb in\ngether_disconnect() is delayed until the end of the function.\n\nMove the clearing of dev->port_usb to the very beginning of\ngether_disconnect() while holding dev->lock. This cuts off the link\nimmediately, ensuring eth_stop() will see dev->port_usb as NULL and\nsafely bail out."}], "id": "CVE-2026-31728", "lastModified": "2026-05-01T15:24:14.893", "metrics": {}, "published": "2026-05-01T15:16:35.333", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ad77458637b78ec655e3da5f112c862e6690a9d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8ff689edfeceb5e3ec1623e09af2b2aa0f1098a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a259ba0bce3b192c04334499690372a250f7d0b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bbb09bb89ffa571475f66daca9482b974cd29d6a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e1e7a66584bf0aff3becb73c19fa31527889fc9e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e1eabb072c75681f78312c484ccfffb7430f206e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f02980594deef751e42133714aee25228f1494c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f6813c2b2ae78def76b69e0f9d72f80e4a1c4aca"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: usb: gadget: u_ether: Fix race between gether_disconnect and eth_stop", "id": "2464472", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464472"}, "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-367", "details": ["A flaw was found in the Linux kernel's `usb: gadget: u_ether` module. A race condition between the `gether_disconnect()` and `eth_stop()` functions can lead to a NULL pointer dereference. This occurs when `eth_stop()` is triggered concurrently while `gether_disconnect()` is tearing down USB endpoints. The vulnerability can cause a system hardlockup, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-31728", "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": "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": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31728\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31728\nhttps://lore.kernel.org/linux-cve-announce/2026050136-CVE-2026-31728-47b6@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3d942c4878084a37991a65e66512c02b8fa2ad,f02980594deef751e42133714aee25228f1494c6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3d942c4878084a37991a65e66512c02b8fa2ad,e1e7a66584bf0aff3becb73c19fa31527889fc9e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3d942c4878084a37991a65e66512c02b8fa2ad,a259ba0bce3b192c04334499690372a250f7d0b1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3d942c4878084a37991a65e66512c02b8fa2ad,f6813c2b2ae78def76b69e0f9d72f80e4a1c4aca)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3d942c4878084a37991a65e66512c02b8fa2ad,bbb09bb89ffa571475f66daca9482b974cd29d6a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3d942c4878084a37991a65e66512c02b8fa2ad,6ad77458637b78ec655e3da5f112c862e6690a9d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3d942c4878084a37991a65e66512c02b8fa2ad,8ff689edfeceb5e3ec1623e09af2b2aa0f1098a8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2b3d942c4878084a37991a65e66512c02b8fa2ad,e1eabb072c75681f78312c484ccfffb7430f206e)"}}], "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": "2.6.27"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.27)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.253,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.169,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.134,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.81,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "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": "2026-05-01T17:45:15.252015+00:00", "updated": "2026-05-02T12:00:14.373077+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}