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CVE-2026-98752— tty: port: fix tty_port_tty_vhangup() race

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.

在 Linux 内核中，以下漏洞已得到修复： tty: 端口：修复 tty_port_tty_vhangup() 的竞态问题 驱动程序依赖 tty_port_tty_vhangup() 在注销过程中（例如物理断开连接时）同步挂起其端口，以便在释放资源前完成操作。 然而，如果 tty_port_tty_vhangup() 与另一个挂起操作发生竞态，它可能会在端口尚未完全关闭之前就返回。这进而可能导致在竞态的 ioctl 调用（包括同步挂起）以及竞态的异步挂起处理（如载波丢失）中出现释放后使用（use-after-fr

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e< ce220b4cdf62f73db0c1940f968eb33b9899fdd0 affected
7ca0ff9ab3218ec443a7a9ad247e4650373ed41e< 6d1a984afc3ca477dab3e51ec806671d443ad524 affected
7ca0ff9ab3218ec443a7a9ad247e4650373ed41e< 6b7be3b9b857947e9c1338d4919d4ebd3b75e907 affected
7ca0ff9ab3218ec443a7a9ad247e4650373ed41e< 017b18addbe8dcace1a569a00d40ed1ba1e03f4c affected
7ca0ff9ab3218ec443a7a9ad247e4650373ed41e< b48820de8c1a596c5b99775524dfce73c6576c5d affected
4260dc792fabfd20c8644fa9414b2ae48372365f affected
2.6.31.2< 2.6.32 affected
2.6.32 affected
… +6 more rows
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I. Basic Information for CVE-2026-98752

Vulnerability Information
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Vulnerability Title
tty: port: fix tty_port_tty_vhangup() race
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: tty: port: fix tty_port_tty_vhangup() race Drivers rely on tty_port_tty_vhangup() to synchronously hang up their ports before tearing down resources as part of deregistration (e.g. on physical disconnect). If tty_port_tty_vhangup() races with another hangup it may however return before the port has been shut down. This is in turn can lead to use-after-free and NULL-pointer dereferences in racing ioctls (including a synchronous hangup) and in processing of racing asynchronous hangups (carrier loss). Add the missing serialisation to tty_port_tty_vhangup() and tty_port_hangup() so that the former does not return until the port has been shut down also when there is a racing hangup. Note that serial core does not use tty_port_hangup(), but it already holds the port mutex when clearing port->tty and shutting down the port in uart_hangup().
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e ~ ce220b4cdf62f73db0c1940f968eb33b9899fdd0 -
Linux Linux 2.6.32 -

II. Public POCs for CVE-2026-98752

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III. Intelligence Information for CVE-2026-98752

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Patches & Fixes for CVE-2026-98752 (3)

Same Patch Batch · Linux · 2026-10-18 · 435 CVEs total

CVE-2026-98719 KVM: SEV: Nullify "have run CPUs" mask pointer when freeing it
CVE-2026-98732 Bluetooth: btintel: fix buffer over-read in btintel_hw_error()
CVE-2026-98731 Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
CVE-2026-98730 Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()
CVE-2026-98729 x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h
CVE-2026-98728 tpm: fix off-by-four bounds check in tpm2_get_random()
CVE-2026-98727 nvme-multipath: set BLK_FEAT_ZONED only after the zone info is known
CVE-2026-98726 nvme-multipath: fix underflow in ANA log bounds checks
CVE-2026-98725 nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
CVE-2026-98724 nvmet: pci-epf: reject too-short SGL segments
CVE-2026-98723 nvmet: copy the hostid into the ctrl before creating PR pc_refs
CVE-2026-98722 mtd: block2mtd: Fix divide error when erase_size is zero
CVE-2026-98721 mtd: rawnand: cadence: Initialize IRQ state before requesting IRQ
CVE-2026-98720 KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified
CVE-2026-98707 wifi: mac80211: shut down RX BA session timer on teardown
CVE-2026-98711 wifi: cw1200: fix TX padding OOB read leaking heap data to device
CVE-2026-98710 wifi: iwlegacy: 3945: free EEPROM data on remove
CVE-2026-98709 wifi: mac80211: count only matching reservations in reserved switch
CVE-2026-98712 KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq
CVE-2026-98708 wifi: mac80211: keep paired old chanctx alive

Showing top 20 of 435 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98752

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