CVE-2026-98753tty: tty_port: restore TTY_IO_ERROR on activation failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 34d4f67472ef7a744970b772a8565ddc727788e2; from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 7021acc84c2e0add77a1a33152e3a1e428fdbfdb; from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 6388409b711eb91b14fa075a4d861ccc4df1cfe7; from a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4 before 56964f6a31238fb41d5830bb42520c5b10ff7d8f | CNA record |
References
- 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.