CVE-2026-98752tty: port: fix tty_port_tty_vhangup() race
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: 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().
- 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) | 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e builds before 6d1a984afc3ca477dab3e51ec806671d443ad524; 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e builds before 6b7be3b9b857947e9c1338d4919d4ebd3b75e907; from 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e before 017b18addbe8dcace1a569a00d40ed1ba1e03f4c; from 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e before b48820de8c1a596c5b99775524dfce73c6576c5d; 4260dc792fabfd20c8644fa9414b2ae48372365f; from 2.6.31.2 before 2.6.32 | CNA record |
References
- https://git.kernel.org/stable/c/6d1a984afc3ca477dab3e51ec806671d443ad524
- https://git.kernel.org/stable/c/6b7be3b9b857947e9c1338d4919d4ebd3b75e907
- https://git.kernel.org/stable/c/017b18addbe8dcace1a569a00d40ed1ba1e03f4c
- https://git.kernel.org/stable/c/b48820de8c1a596c5b99775524dfce73c6576c5d
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.