Not yet scoredPublished Oct 18, 2026

CVE-2026-98753tty: tty_port: restore TTY_IO_ERROR on activation failure

Updated under an hour ago (Oct 26, 2026, 7:00 PM ET)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 18, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 16032c980d8f71642fcdc99309c571df3fcf3328; from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 34d4f67472ef7a744970b772a8565ddc727788e2; from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 7021acc84c2e0add77a1a33152e3a1e428fdbfdb; from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 6388409b711eb91b14fa075a4d861ccc4df1cfe7; from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 56964f6a31238fb41d5830bb42520c5b10ff7d8f	CNA record

References

References

https://git.kernel.org/stable/c/16032c980d8f71642fcdc99309c571df3fcf3328
https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2
https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb
https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7
https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.