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CVE-2022-48871— tty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer

EPSS 0.02% · P4
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I. Basic Information for CVE-2022-48871

Vulnerability Information
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Vulnerability Title
tty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于 tty/serial 组件在qcom-geni-serial驱动中存在slab越界问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux f9d690b6ece7ec9a6ff6b588df95a010ab2d66f9 ~ 894681682dbefdad917b88f86cde1069140a047a -
LinuxLinux 5.7 -

II. Public POCs for CVE-2022-48871

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III. Intelligence Information for CVE-2022-48871

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Same Patch Batch · Linux · 2024-08-21 · 69 CVEs total

CVE-2022-48877f2fs: let's avoid panic if extent_tree is not created
CVE-2024-43874crypto: ccp - Fix null pointer dereference in __sev_snp_shutdown_locked
CVE-2024-43873vhost/vsock: always initialize seqpacket_allow
CVE-2024-43875PCI: endpoint: Clean up error handling in vpci_scan_bus()
CVE-2022-48870tty: fix possible null-ptr-defer in spk_ttyio_release
CVE-2022-48872misc: fastrpc: Fix use-after-free race condition for maps
CVE-2022-48873misc: fastrpc: Don't remove map on creater_process and device_release
CVE-2022-48874misc: fastrpc: Fix use-after-free and race in fastrpc_map_find
CVE-2022-48875wifi: mac80211: sdata can be NULL during AMPDU start
CVE-2022-48876wifi: mac80211: fix initialization of rx->link and rx->link_sta
CVE-2022-48869USB: gadgetfs: Fix race between mounting and unmounting
CVE-2022-48878Bluetooth: hci_qca: Fix driver shutdown on closed serdev
CVE-2022-48879efi: fix NULL-deref in init error path
CVE-2022-48880platform/surface: aggregator: Add missing call to ssam_request_sync_free()
CVE-2022-48881platform/x86/amd: Fix refcount leak in amd_pmc_probe
CVE-2022-48882net/mlx5e: Fix macsec possible null dereference when updating MAC security entity (SecY)
CVE-2022-48883net/mlx5e: IPoIB, Block PKEY interfaces with less rx queues than parent
CVE-2022-48884net/mlx5: Fix command stats access after free
CVE-2022-48885ice: Fix potential memory leak in ice_gnss_tty_write()
CVE-2022-48886ice: Add check for kzalloc

Showing top 20 of 69 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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Same vendor: Linux

V. Comments for CVE-2022-48871

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