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CVE-2023-52456— serial: imx: fix tx statemachine deadlock

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 5.3 Difficulty: Easy EPSS 0.18% · P6

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux cb1a609236096c278ecbfb7be678a693a70283f1< 6e04a9d30509fb53ba6df5d655ed61d607a7cfda affected
cb1a609236096c278ecbfb7be678a693a70283f1< ff168d4fdb0e1ba35fb413a749b3d6cce918ec19 affected
cb1a609236096c278ecbfb7be678a693a70283f1< 63ee7be01a3f7d28b1ea8b8d7944f12bb7b0ed06 affected
cb1a609236096c278ecbfb7be678a693a70283f1< 763cd68746317b5d746dc2649a3295c1efb41181 affected
cb1a609236096c278ecbfb7be678a693a70283f1< 9a662d06c22ddfa371958c2071dc350436be802b affected
cb1a609236096c278ecbfb7be678a693a70283f1< 78d60dae9a0c9f09aa3d6477c94047df2fe6f7b0 affected
5.9 affected
< 5.9 unaffected
… +6 more rows
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux cb1a609236096c278ecbfb7be678a693a70283f1 ~ 6e04a9d30509fb53ba6df5d655ed61d607a7cfda -
Linux Linux 5.9 -

II. Public POCs for CVE-2023-52456

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III. Intelligence Information for CVE-2023-52456

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Mailing List Discussions for CVE-2023-52456 (1)

Other References for CVE-2023-52456 (6)

Same Patch Batch · Linux · 2024-02-23 · 19 CVEs total

CVE-2024-26594 9.1 CRITICAL ksmbd: validate mech token in session setup
CVE-2024-26598 8.8 HIGH KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache
CVE-2024-26597 7.8 HIGH net: qualcomm: rmnet: fix global oob in rmnet_policy
CVE-2023-52461 7.8 HIGH drm/sched: Fix bounds limiting when given a malformed entity
CVE-2023-52454 7.5 HIGH nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length
CVE-2023-52453 7.1 HIGH hisi_acc_vfio_pci: Update migration data pointer correctly on saving/resume
CVE-2024-26593 i2c: i801: Fix block process call transactions
CVE-2023-52455 iommu: Don't reserve 0-length IOVA region
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-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-2024-26599 pwm: Fix out-of-bounds access in of_pwm_single_xlate()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52456

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