{"cve":"CVE-2025-38229","nvd":{"published":"2025-07-04T14:15:32.410","modified":"2026-06-17T09:16:26.110","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cxusb: no longer judge rbuf when the write fails\n\nsyzbot reported a uninit-value in cxusb_i2c_xfer. [1]\n\nOnly when the write operation of usb_bulk_msg() in dvb_usb_generic_rw()\nsucceeds and rlen is greater than 0, the read operation of usb_bulk_msg()\nwill be executed to read rlen bytes of data from the dvb device into the\nrbuf.\n\nIn this case, although rlen is 1, the write operation failed which resulted\nin the dvb read operation not being executed, and ultimately variable i was\nnot initialized.\n\n[1]\nBUG: KMSAN: uninit-value in cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:124 [inline]\nBUG: KMSAN: uninit-value in cxusb_i2c_xfer+0x153a/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196\n cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:124 [inline]\n cxusb_i2c_xfer+0x153a/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196\n __i2c_transfer+0xe25/0x3150 drivers/i2c/i2c-core-base.c:-1\n i2c_transfer+0x317/0x4a0 drivers/i2c/i2c-core-base.c:2315\n i2c_transfer_buffer_flags+0x125/0x1e0 drivers/i2c/i2c-core-base.c:2343\n i2c_master_send include/linux/i2c.h:109 [inline]\n i2cdev_write+0x210/0x280 drivers/i2c/i2c-dev.c:183\n do_loop_readv_writev fs/read_write.c:848 [inline]\n vfs_writev+0x963/0x14e0 fs/read_write.c:1057\n do_writev+0x247/0x5c0 fs/read_write.c:1101\n __do_sys_writev fs/read_write.c:1169 [inline]\n __se_sys_writev fs/read_write.c:1166 [inline]\n __x64_sys_writev+0x98/0xe0 fs/read_write.c:1166\n x64_sys_call+0x2229/0x3c80 arch/x86/include/generated/asm/syscalls_64.h:21\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xcd/0x1e0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-908"],"references":["https://git.kernel.org/stable/c/04354c529c8246a38ae28f713fd6bfdc028113bc","https://git.kernel.org/stable/c/390b864e3281802109dfe56e508396683e125653","https://git.kernel.org/stable/c/41807a5f67420464ac8ee7741504f6b5decb3b7c","https://git.kernel.org/stable/c/73fb3b92da84637e3817580fa205d48065924e15","https://git.kernel.org/stable/c/77829a5f5a74026b888b0529628475b29750cef4"],"products":["debian:debian_linux","linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:04:28.436527499+00:00"},"epss":{"cve":"CVE-2025-38229","score":0.00183,"percentile":0.0789,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}