CVE-2026-98753

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.

Package Linux Kernel
Published 2026-10-18
Last modified 2026-10-18
Patch available
Yes

Affected versions

Linux kernel versions 2.6.33 and later are affected. Fixed in 6.12.113, 6.18.56, 7.2.10, 7.3 and their respective stable series.

Affected from
≥ 2.6.33
Fixed in
✓ 6.12.113 6.12.x ✓ 6.18.56 6.18.x ✓ 7.2.10 7.2.x ✓ 7.3

References

4 total

Frequently asked questions

  • What is CVE-2026-98753?

    CVE-2026-98753 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.33 onward and has been patched in 6.12.113, 6.18.56, 7.2.10 and others. CVE-2026-98753 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-98753?

    Yes. CVE-2026-98753 has been patched. Fixed versions include 6.12.113, 6.18.56, 7.2.10 and others. If you are running Linux kernel 2.6.33 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-98753 actively exploited?

    No. CVE-2026-98753 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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