CVE-2023-52456— serial: imx: fix tx statemachine deadlock
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I. Basic Information for CVE-2023-52456
Vulnerability Information
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Vulnerability Title
serial: imx: fix tx statemachine deadlock
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: serial: imx: fix tx statemachine deadlock When using the serial port as RS485 port, the tx statemachine is used to control the RTS pin to drive the RS485 transceiver TX_EN pin. When the TTY port is closed in the middle of a transmission (for instance during userland application crash), imx_uart_shutdown disables the interface and disables the Transmission Complete interrupt. afer that, imx_uart_stop_tx bails on an incomplete transmission, to be retriggered by the TC interrupt. This interrupt is disabled and therefore the tx statemachine never transitions out of SEND. The statemachine is in deadlock now, and the TX_EN remains low, making the interface useless. imx_uart_stop_tx now checks for incomplete transmission AND whether TC interrupts are enabled before bailing to be retriggered. This makes sure the state machine handling is reached, and is properly set to WAIT_AFTER_SEND.
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 tx 状态机存在死锁问题。
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
II. Public POCs for CVE-2023-52456
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Same Patch Batch · Linux · 2024-02-23 · 19 CVEs total
| CVE-2023-52461 | drm/sched: Fix bounds limiting when given a malformed entity | |
| CVE-2024-26593 | i2c: i801: Fix block process call transactions | |
| CVE-2024-26594 | ksmbd: validate mech token in session setup | |
| CVE-2023-52453 | hisi_acc_vfio_pci: Update migration data pointer correctly on saving/resume | |
| CVE-2023-52455 | iommu: Don't reserve 0-length IOVA region | |
| CVE-2023-52454 | nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length | |
| CVE-2023-52458 | block: add check that partition length needs to be aligned with block size | |
| CVE-2023-52457 | serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed | |
| CVE-2023-52459 | media: v4l: async: Fix duplicated list deletion | |
| CVE-2024-26598 | KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache | |
| CVE-2023-52460 | drm/amd/display: Fix NULL pointer dereference at hibernate | |
| CVE-2023-52462 | bpf: fix check for attempt to corrupt spilled pointer | |
| CVE-2023-52464 | EDAC/thunderx: Fix possible out-of-bounds string access | |
| CVE-2023-52463 | efivarfs: force RO when remounting if SetVariable is not supported | |
| CVE-2024-26596 | net: dsa: fix netdev_priv() dereference before check on non-DSA netdevice events | |
| CVE-2024-26595 | mlxsw: spectrum_acl_tcam: Fix NULL pointer dereference in error path | |
| CVE-2024-26597 | net: qualcomm: rmnet: fix global oob in rmnet_policy | |
| CVE-2024-26599 | pwm: Fix out-of-bounds access in of_pwm_single_xlate() |
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2023-52456
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