{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80827", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.795Z", "datePublished": "2026-09-04T15:54:31.111Z", "dateUpdated": "2026-10-19T08:44:19.753Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:44:19.753Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: option: fix slab OOB read in interrupt URB callback\n\nThe interrupt URB buffer is allocated in setup_port_interrupt_in() based\non the endpoint's wMaxPacketSize:\n\n buffer_size = usb_endpoint_maxp(epd);\n port->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL);\n\nWhen a USB device declares wMaxPacketSize = 8 on its interrupt IN\nendpoint, the buffer is allocated from kmalloc-8 cache (exactly\n8 bytes).\n\nIf the device sends a short packet (actual_length < wMaxPacketSize),\nthe URB completes with status == 0 and the callback proceeds to read:\n\n data[sizeof(struct usb_ctrlrequest)]\n\nwhich evaluates to data[8], accessing 1 byte beyond the allocated 8-byte\nbuffer. This results in a slab out-of-bounds read.\n\nFix this by adding the missing bounds check: first verify that the\nactual length is large enough to contain the struct usb_ctrlrequest\nheader before accessing req_pkt->bRequestType and req_pkt->bRequest,\nand then verify that there is an additional byte for the modem signal\nstate before reading data[sizeof(struct usb_ctrlrequest)] inside the\nconditional. Use sizeof(*req_pkt) instead of sizeof(struct\nusb_ctrlrequest) for consistency.\n\n[ johan: use dev_err(); split signals declaration and initialisation ]" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/usb/serial/option.c" ], "versions": [ { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "fbe60fd2abc8a5561f39719a41ad9a01b5d8e567", "status": "affected", "versionType": "git" }, { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "94e5525697b9e91ddc4071129874120a50a4f342", "status": "affected", "versionType": "git" }, { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "6b8cf5422c7e96ed5b22a8368eff663f3f98b8ec", "status": "affected", "versionType": "git" }, { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "030e3a73d3c3aa67c44454649e984d6383cdb7d3", "status": "affected", "versionType": "git" }, { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "060db7d48af1e650643c8b8319111a9ea2ce4486", "status": "affected", "versionType": "git" }, { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "2ef5560387f2c0713cee975be2b24b281bd90f3e", "status": "affected", "versionType": "git" }, { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "a72a13c83a652516a0e469d275b81d29a7429049", "status": "affected", "versionType": "git" }, { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "d762aef4eba354066be21a5d88eb2066e282f4c9", "status": "affected", "versionType": "git" }, { "version": "58cfe9113e485f7e04bd0eac4fc4251b330af501", "lessThan": "885d802f544ca7bfa8f3984d94233cce715bb6b3", "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/serial/option.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.269", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.220", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.187", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.156", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.108", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.49", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.13", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.3", "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": "2.6.12", "versionEndExcluding": "5.10.269" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.220" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.187" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.156" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.108" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.49" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.1.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.2.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/fbe60fd2abc8a5561f39719a41ad9a01b5d8e567" }, { "url": "https://git.kernel.org/stable/c/94e5525697b9e91ddc4071129874120a50a4f342" }, { "url": "https://git.kernel.org/stable/c/6b8cf5422c7e96ed5b22a8368eff663f3f98b8ec" }, { "url": "https://git.kernel.org/stable/c/030e3a73d3c3aa67c44454649e984d6383cdb7d3" }, { "url": "https://git.kernel.org/stable/c/060db7d48af1e650643c8b8319111a9ea2ce4486" }, { "url": "https://git.kernel.org/stable/c/2ef5560387f2c0713cee975be2b24b281bd90f3e" }, { "url": "https://git.kernel.org/stable/c/a72a13c83a652516a0e469d275b81d29a7429049" }, { "url": "https://git.kernel.org/stable/c/d762aef4eba354066be21a5d88eb2066e282f4c9" }, { "url": "https://git.kernel.org/stable/c/885d802f544ca7bfa8f3984d94233cce715bb6b3" } ], "title": "USB: serial: option: fix slab OOB read in interrupt URB callback", "x_generator": { "engine": "bippy-1.2.0" } } } }