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VULNERABILITIES

CVE-2026-98753 Details

Description

In the Linux kernel, the following vulnerability has been resolved: tty: tty_port: restore TTY_IO_ERROR on activation failure Make sure to restore the TTY_IO_ERROR flag if activation fails to prevent I/O attempts on a port that is gone or powered down. This specifically avoids issues like kernel panic due to unclocked accesses or NULL-pointer dereferences when accessing powered down or deregistered ports when a TTY ioctl races with hangup and open. Note that the flag is set again in tty_port_close() but not restoring it on activation failure leaves a window where drivers fail to handle the ioctl-hangup race.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/16032c980d8f71642fcdc99309c571df3fcf3328 kernel.org
https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2 kernel.org
https://git.kernel.org/stable/c/5469dc4153a60289c5bae00215947c6ce09fcc0e kernel.org
https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f kernel.org
https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7 kernel.org

see all 8 references

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-98753
NVD Published Date:
Oct 18, 2026
NVD Last Modified:
Oct 30, 2026
Source:
kernel.org
CVE-2026-98753 Details - Not Deferred