Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-80990

Vulnerability details

The vulnerability allows an attacker with physical access to cause a denial of service.

The vulnerability exists due to improper resource release in tbnet_connected_work() when handling an Rx HopID allocation mismatch during an XDomain connection. An attacker with physical access can trigger an Rx HopID allocation mismatch to cause a denial of service.

Affected software

How to mitigate CVE-2026-80990

External References

• https://git.kernel.org/stable/c/1c361f6cf39be7cc0ce37c0b67bd1cdf74b0a0c1
• https://git.kernel.org/stable/c/2f1463554d0561a2fead81e3888604e5c1125e29
• https://git.kernel.org/stable/c/61ff3c353e5d2ff4eb9d0b6d8d9e47805b136eea
• https://git.kernel.org/stable/c/9eac1817bfc5fa76e3a2d1b8fd824cc6ef5a9ab0

Related Security Bulletins

• Missing Release of Resource after Effective Lifetime in Linux kernel net thunderbolt driver