What’s Vulnerable › Vulnerabilities

CVE-2026-98751: tty: abort break signalling on hangup

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: tty: abort break signalling on hangup The break ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down. Drivers must handle this race, but TCSBRK and TCSBRKP should still be aborted to avoid calling back into the driver after a user-controlled timeout (possibly even after the tty has been reopened). Note that drivers should disable any break state on shutdown so just return on hangup (calling break_ctl() again is racy and will most likely fail for drivers handling the race).

Affected products

• Linux kernel: 2.6.26 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3bc82999fb85cecc7eb6ec1755ee7d698aa1e783
• https://git.kernel.org/stable/c/6c9c9367351a461d62e5c0a39bffdcfbb40f068b
• https://git.kernel.org/stable/c/845a2737e0f5ffe5ca8d38de556012b0c9472cdd
• https://git.kernel.org/stable/c/94af6cd832e9b4ce39a8fb59144a8f09ab56fd35
• https://git.kernel.org/stable/c/c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6

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