{"id":"CVE-2026-74456","revision":"a92c245e29ab4a38852e19744235f64f","records":[{"revision":"a92c245e29ab4a38852e19744235f64f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74456","aliases":[],"title":"can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error\n\nIn peak_usb_start(), each RX URB transfer buffer is allocated with kmalloc()\nand the URB is flagged URB_FREE_BUFFER so that the final usb_free_urb() also\nfrees the transfer buffer.\n\nIf usb_submit_urb() fails, the error path frees the buffer explicitly with\nkfree(buf) and then calls usb_free_urb(urb). Because URB_FREE_BUFFER is set,\nusb_free_urb() -> urb_destroy() frees the same buffer a second time, a double\nfree of the transfer buffer.\n\n  BUG: KASAN: double-free in usb_free_urb.part.0+0x91/0xb0\n  Free of addr ffff8881069ccb80 by task trigger.sh/285\n\n  Call Trace:\n   kfree+0x113/0x3c0\n   usb_free_urb.part.0+0x91/0xb0\n\nDrop the redundant kfree(buf); usb_free_urb() already releases the transfer\nbuffer. This mirrors commit 03819abbeb11 (\"net: usb: lan78xx: Fix double free\nissue with interrupt buffer allocation\").","state":0,"publishedAt":"2026-08-15T12:26:58.808+00:00","modifiedAt":"2026-10-16T19:05:46.867+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/can/usb/peak_usb/pcan_usb_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d\",\n                            \"lessThan\": \"914c3b8fa175acf8476ad31cf04e308638e3578e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d\",\n                            \"lessThan\": \"5f2fa5840c34d3a558c57855781be75e03bef752\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d\",\n                            \"lessThan\": \"b9088d581fff971a7eb1628f8dcc30df6cfef4dc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d\",\n                            \"lessThan\": \"525640b93d3e5f82f4ebea4730f4e0cf799522ba\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d\",\n                            \"lessThan\": \"4bb3325075138dd5346b71589a959878b564dc0b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d\",\n                            \"lessThan\": \"92d0de80ca2223b9c7da78020155b6cb27824cc0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d\",\n                            \"lessThan\": \"dfb17bf04a764462000f11258a7c06aa92d1f261\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d\",\n                            \"lessThan\": \"9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/can/usb/peak_usb/pcan_usb_core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.151\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/914c3b8fa175acf8476ad31cf04e308638e3578e","https://git.kernel.org/stable/c/5f2fa5840c34d3a558c57855781be75e03bef752","https://git.kernel.org/stable/c/b9088d581fff971a7eb1628f8dcc30df6cfef4dc","https://git.kernel.org/stable/c/525640b93d3e5f82f4ebea4730f4e0cf799522ba","https://git.kernel.org/stable/c/4bb3325075138dd5346b71589a959878b564dc0b","https://git.kernel.org/stable/c/92d0de80ca2223b9c7da78020155b6cb27824cc0","https://git.kernel.org/stable/c/dfb17bf04a764462000f11258a7c06aa92d1f261","https://git.kernel.org/stable/c/9b3d5a6d952c38bbcf07f903cbeadefdb56b9bc9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74456","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74456","identifiers":["CVE-2026-74456"]},"retained":false,"historicalAffected":[]}],"coverage":[]}