ghsa-hq8p-jq83-pjp2
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
tty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer
Driver's probe allocates memory for RX FIFO (port->rx_fifo) based on default RX FIFO depth, e.g. 16. Later during serial startup the qcom_geni_serial_port_setup() updates the RX FIFO depth (port->rx_fifo_depth) to match real device capabilities, e.g. to 32.
The RX UART handle code will read "port->rx_fifo_depth" number of words into "port->rx_fifo" buffer, thus exceeding the bounds. This can be observed in certain configurations with Qualcomm Bluetooth HCI UART device and KASAN:
Bluetooth: hci0: QCA Product ID :0x00000010 Bluetooth: hci0: QCA SOC Version :0x400a0200 Bluetooth: hci0: QCA ROM Version :0x00000200 Bluetooth: hci0: QCA Patch Version:0x00000d2b Bluetooth: hci0: QCA controller version 0x02000200 Bluetooth: hci0: QCA Downloading qca/htbtfw20.tlv bluetooth hci0: Direct firmware load for qca/htbtfw20.tlv failed with error -2 Bluetooth: hci0: QCA Failed to request file: qca/htbtfw20.tlv (-2) Bluetooth: hci0: QCA Failed to download patch (-2) ================================================================== BUG: KASAN: slab-out-of-bounds in handle_rx_uart+0xa8/0x18c Write of size 4 at addr ffff279347d578c0 by task swapper/0/0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.0-rt5-00350-gb2450b7e00be-dirty #26 Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) Call trace: dump_backtrace.part.0+0xe0/0xf0 show_stack+0x18/0x40 dump_stack_lvl+0x8c/0xb8 print_report+0x188/0x488 kasan_report+0xb4/0x100 __asan_store4+0x80/0xa4 handle_rx_uart+0xa8/0x18c qcom_geni_serial_handle_rx+0x84/0x9c qcom_geni_serial_isr+0x24c/0x760 __handle_irq_event_percpu+0x108/0x500 handle_irq_event+0x6c/0x110 handle_fasteoi_irq+0x138/0x2cc generic_handle_domain_irq+0x48/0x64
If the RX FIFO depth changes after probe, be sure to resize the buffer.
{
"affected": [],
"aliases": [
"CVE-2022-48871"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-21T07:15:04Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer\n\nDriver\u0027s probe allocates memory for RX FIFO (port-\u003erx_fifo) based on\ndefault RX FIFO depth, e.g. 16. Later during serial startup the\nqcom_geni_serial_port_setup() updates the RX FIFO depth\n(port-\u003erx_fifo_depth) to match real device capabilities, e.g. to 32.\n\nThe RX UART handle code will read \"port-\u003erx_fifo_depth\" number of words\ninto \"port-\u003erx_fifo\" buffer, thus exceeding the bounds. This can be\nobserved in certain configurations with Qualcomm Bluetooth HCI UART\ndevice and KASAN:\n\n Bluetooth: hci0: QCA Product ID :0x00000010\n Bluetooth: hci0: QCA SOC Version :0x400a0200\n Bluetooth: hci0: QCA ROM Version :0x00000200\n Bluetooth: hci0: QCA Patch Version:0x00000d2b\n Bluetooth: hci0: QCA controller version 0x02000200\n Bluetooth: hci0: QCA Downloading qca/htbtfw20.tlv\n bluetooth hci0: Direct firmware load for qca/htbtfw20.tlv failed with error -2\n Bluetooth: hci0: QCA Failed to request file: qca/htbtfw20.tlv (-2)\n Bluetooth: hci0: QCA Failed to download patch (-2)\n ==================================================================\n BUG: KASAN: slab-out-of-bounds in handle_rx_uart+0xa8/0x18c\n Write of size 4 at addr ffff279347d578c0 by task swapper/0/0\n\n CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.0-rt5-00350-gb2450b7e00be-dirty #26\n Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT)\n Call trace:\n dump_backtrace.part.0+0xe0/0xf0\n show_stack+0x18/0x40\n dump_stack_lvl+0x8c/0xb8\n print_report+0x188/0x488\n kasan_report+0xb4/0x100\n __asan_store4+0x80/0xa4\n handle_rx_uart+0xa8/0x18c\n qcom_geni_serial_handle_rx+0x84/0x9c\n qcom_geni_serial_isr+0x24c/0x760\n __handle_irq_event_percpu+0x108/0x500\n handle_irq_event+0x6c/0x110\n handle_fasteoi_irq+0x138/0x2cc\n generic_handle_domain_irq+0x48/0x64\n\nIf the RX FIFO depth changes after probe, be sure to resize the buffer.",
"id": "GHSA-hq8p-jq83-pjp2",
"modified": "2024-09-06T15:32:56Z",
"published": "2024-08-21T09:31:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48871"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/894681682dbefdad917b88f86cde1069140a047a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b8caf69a6946e18ffebad49847e258f5b6d52ac2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cb53a3366eb28fed67850c80afa52075bb71a38a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fd524ca7fe45b8a06dca2dd546d62684a9768f95"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.