{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-26748", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.168Z", "datePublished": "2024-04-03T17:00:35.087Z", "dateUpdated": "2026-08-05T11:26:59.831Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:26:59.831Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: fix memory double free when handle zero packet\n\n829 if (request->complete) {\n830 spin_unlock(&priv_dev->lock);\n831 usb_gadget_giveback_request(&priv_ep->endpoint,\n832 request);\n833 spin_lock(&priv_dev->lock);\n834 }\n835\n836 if (request->buf == priv_dev->zlp_buf)\n837 cdns3_gadget_ep_free_request(&priv_ep->endpoint, request);\n\nDriver append an additional zero packet request when queue a packet, which\nlength mod max packet size is 0. When transfer complete, run to line 831,\nusb_gadget_giveback_request() will free this requestion. 836 condition is\ntrue, so cdns3_gadget_ep_free_request() free this request again.\n\nLog:\n\n[ 1920.140696][ T150] BUG: KFENCE: use-after-free read in cdns3_gadget_giveback+0x134/0x2c0 [cdns3]\n[ 1920.140696][ T150]\n[ 1920.151837][ T150] Use-after-free read at 0x000000003d1cd10b (in kfence-#36):\n[ 1920.159082][ T150] cdns3_gadget_giveback+0x134/0x2c0 [cdns3]\n[ 1920.164988][ T150] cdns3_transfer_completed+0x438/0x5f8 [cdns3]\n\nAdd check at line 829, skip call usb_gadget_giveback_request() if it is\nadditional zero length packet request. Needn't call\nusb_gadget_giveback_request() because it is allocated in this driver." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is selected entirely by locally queued transfer parameters (`req->zero` plus `length % maxpacket == 0`) set by in-kernel function drivers on behalf of local userspace — USB-Ethernet/NCM tethering, the printer gadget, UVC streaming — not by anything a USB peer supplies, so no physical action by the attacker is needed on a peripheral in its normal connected operating state. This matches the AV:L treatment of the sibling cdns3 gadget flaw CVE-2024-26747.\nAC:L - The attacker fully controls the transfer length, and the ZLP request append plus the buggy giveback sequence follow deterministically; the lock-drop window around `usb_gadget_giveback_request()` is one the attacker widens at will by queuing transfers concurrently from multiple threads.\nPR:L - Once the gadget is configured (normal system state on these embedded boards), any unprivileged process can drive the path — e.g. sending a UDP datagram sized so the NCM/ECM frame is an exact multiple of the 512/1024-byte bulk-IN maxpacket over `usb0`, or writing to `/dev/g_printer0` or the UVC gadget node — with no capability check anywhere on the path.\nUI:N - No victim action is required; the affected devices operate as USB peripherals attached to a host as their normal deployed state, and the attacker triggers the flaw purely by generating traffic.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The flaw includes a confirmed use-after-free read of a freed `struct cdns3_request` (KFENCE-reported), and the double free of a kmalloc-192 general-cache object lets an attacker reallocate it with sprayed data and have the driver disclose or act on it, enabling arbitrary kernel memory disclosure.\nI:H - Freeing a still-live request returns an in-use object to the general slab allocator while the driver continues writing into it (`request->actual`, `finished_trb`, TRB pointers, list linkage), a classic double-free/UAF write primitive leveragable for control-flow hijack and privilege escalation.\nA:H - The double free corrupts slab freelists and the endpoint request lists, reliably producing kernel oops/panic, and it can be re-triggered at will by an unprivileged local process." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/usb/cdns3/cdns3-gadget.c" ], "versions": [ { "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe", "lessThan": "aad6132ae6e4809e375431f8defd1521985e44e7", "status": "affected", "versionType": "git" }, { "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe", "lessThan": "1e204a8e9eb514e22a6567fb340ebb47df3f3a48", "status": "affected", "versionType": "git" }, { "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe", "lessThan": "3a2a909942b5335b7ea66366d84261b3ed5f89c8", "status": "affected", "versionType": "git" }, { "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe", "lessThan": "9a52b694b066f299d8b9800854a8503457a8b64c", "status": "affected", "versionType": "git" }, { "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe", "lessThan": "70e8038813f9d3e72df966748ebbc40efe466019", "status": "affected", "versionType": "git" }, { "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe", "lessThan": "92d20406a3d4ff3e8be667c79209dc9ed31df5b3", "status": "affected", "versionType": "git" }, { "version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe", "lessThan": "5fd9e45f1ebcd57181358af28506e8a661a260b3", "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/cdns3/cdns3-gadget.c" ], "versions": [ { "version": "5.4", "status": "affected" }, { "version": "0", "lessThan": "5.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.270", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.211", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.150", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.80", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.19", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.7", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "5.4", "versionEndExcluding": "5.4.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.10.211" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.15.150" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.1.80" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.6.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.7.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/aad6132ae6e4809e375431f8defd1521985e44e7" }, { "url": "https://git.kernel.org/stable/c/1e204a8e9eb514e22a6567fb340ebb47df3f3a48" }, { "url": "https://git.kernel.org/stable/c/3a2a909942b5335b7ea66366d84261b3ed5f89c8" }, { "url": "https://git.kernel.org/stable/c/9a52b694b066f299d8b9800854a8503457a8b64c" }, { "url": "https://git.kernel.org/stable/c/70e8038813f9d3e72df966748ebbc40efe466019" }, { "url": "https://git.kernel.org/stable/c/92d20406a3d4ff3e8be667c79209dc9ed31df5b3" }, { "url": "https://git.kernel.org/stable/c/5fd9e45f1ebcd57181358af28506e8a661a260b3" } ], "title": "usb: cdns3: fix memory double free when handle zero packet", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26748", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-04-05T17:31:00.230088Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:49:02.965Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:13.207Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/aad6132ae6e4809e375431f8defd1521985e44e7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/1e204a8e9eb514e22a6567fb340ebb47df3f3a48", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3a2a909942b5335b7ea66366d84261b3ed5f89c8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/9a52b694b066f299d8b9800854a8503457a8b64c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/70e8038813f9d3e72df966748ebbc40efe466019", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/92d20406a3d4ff3e8be667c79209dc9ed31df5b3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/5fd9e45f1ebcd57181358af28506e8a661a260b3", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": [ "x_transferred" ] } ] } ] }, "dataVersion": "5.2" }