{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68352", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.300Z", "datePublished": "2025-12-24T10:32:43.366Z", "dateUpdated": "2026-08-05T12:11:00.772Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:11:00.772Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: ch341: fix out-of-bounds memory access in ch341_transfer_one\n\nDiscovered by Atuin - Automated Vulnerability Discovery Engine.\n\nThe 'len' variable is calculated as 'min(32, trans->len + 1)',\nwhich includes the 1-byte command header.\n\nWhen copying data from 'trans->tx_buf' to 'ch341->tx_buf + 1', using 'len'\nas the length is incorrect because:\n\n1. It causes an out-of-bounds read from 'trans->tx_buf' (which has size\n 'trans->len', i.e., 'len - 1' in this context).\n2. It can cause an out-of-bounds write to 'ch341->tx_buf' if 'len' is\n CH341_PACKET_LENGTH (32). Writing 32 bytes to ch341->tx_buf + 1\n overflows the buffer.\n\nFix this by copying 'len - 1' bytes." } ], "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 function is reached through local write or SPI_IOC_MESSAGE operations on a provisioned spidev device. A malicious USB peripheral alone cannot trigger the faulty copy.\nAC:L - A transfer of at least 32 attacker-controlled bytes deterministically produces the one-byte overflow without a race. The attacker controls the overflowing byte and can repeat requests or perform heap grooming.\nPR:L - Binding spidev normally requires administrator provisioning, but the transfer path has no capability check. Once device-node access is granted, an ordinary unprivileged local user can trigger the bug.\nUI:N - The attacker directly opens the device and submits the transfer; no action by another user is required.\nS:U - The vulnerable SPI driver and the affected kernel memory share the same kernel security authority. This is a conventional local kernel privilege-escalation condition rather than a VM or IOMMU boundary escape.\nC:H - The out-of-bounds access can corrupt an adjacent slab object, potentially enabling control-flow hijacking and arbitrary kernel-memory disclosure. Under the required higher-severity treatment of exploitable memory corruption, confidentiality impact is high.\nI:H - For transfers of at least 32 bytes, the attacker controls the byte written beyond ch341->tx_buf. Corruption of adjacent allocator metadata or kernel objects can plausibly yield arbitrary writes or kernel code execution.\nA:H - The adjacent-object corruption can damage allocator metadata or devres list pointers, causing a kernel oops or panic. The triggering transfer can be submitted repeatedly." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/spi/spi-ch341.c" ], "versions": [ { "version": "8846739f52afa07e63395c80227dc544f54bd7b1", "lessThan": "cad6c0fd6f3c0e76a1f75df4bce3b08a13f08974", "status": "affected", "versionType": "git" }, { "version": "8846739f52afa07e63395c80227dc544f54bd7b1", "lessThan": "ea1e43966cd03098fcd5f0d72e6c2901d45fa08d", "status": "affected", "versionType": "git" }, { "version": "8846739f52afa07e63395c80227dc544f54bd7b1", "lessThan": "81841da1f30f66a850cc8796d99ba330aad9d696", "status": "affected", "versionType": "git" }, { "version": "8846739f52afa07e63395c80227dc544f54bd7b1", "lessThan": "545d1287e40a55242f6ab68bcc1ba3b74088b1bc", "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/spi/spi-ch341.c" ], "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.63", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "6.11", "versionEndExcluding": "6.12.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.17.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cad6c0fd6f3c0e76a1f75df4bce3b08a13f08974" }, { "url": "https://git.kernel.org/stable/c/ea1e43966cd03098fcd5f0d72e6c2901d45fa08d" }, { "url": "https://git.kernel.org/stable/c/81841da1f30f66a850cc8796d99ba330aad9d696" }, { "url": "https://git.kernel.org/stable/c/545d1287e40a55242f6ab68bcc1ba3b74088b1bc" } ], "title": "spi: ch341: fix out-of-bounds memory access in ch341_transfer_one", "x_generator": { "engine": "bippy-1.2.0" } } } }