Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-07-27T00:00:00 kernel: Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup() 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CWE-125

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup() bpa10x_setup() sends the vendor command 0xfc0e and passes the response to bt_dev_info() and hci_set_fw_info() as a "%s" string starting at skb->data + 1, without checking the length: bt_dev_info(hdev, "%s", (char *)(skb->data + 1)); hci_set_fw_info(hdev, "%s", skb->data + 1); A device that returns a one-byte response (status only) leaves skb->data + 1 past the end of the data, and the %s walk reads adjacent slab memory until it meets a NUL. The same happens when the payload is not NUL-terminated within skb->len. The out-of-bounds bytes end up in the kernel log and the firmware-info debugfs file. Print the revision string with a bounded "%.*s" limited to skb->len - 1 instead. This keeps the string readable for well-behaved devices while never reading past the received data, and does not fail setup, so a device returning a short or unterminated response keeps working.

A flaw was found in the Linux kernel's Bluetooth bpa10x driver. This vulnerability allows a malicious Bluetooth device to trigger an out-of-bounds read in the `bpa10x_setup()` function by sending a specially crafted one-byte or non-NUL-terminated response. This can lead to information disclosure, where adjacent slab memory contents are written to the kernel log and firmware-info debugfs file.

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-64549 https://nvd.nist.gov/vuln/detail/CVE-2026-64549 https://lore.kernel.org/linux-cve-announce/2026072737-CVE-2026-64549-20a7@gregkh/T