CVE-2026-80965

Summary

In the Linux kernel, the following vulnerability has been resolved:

ALSA: serial-u16550: Check card index validity at probe

serial-u16550 driver blindly trusts that the given devptr->id value is within the proper card index range at probe. It's OK for the devices the driver itself creates at the module probe time, but if the device is bound manually via sysfs interface, this could be -1 as "none", and this leads to OOB access for index[] and other parameters.

Add a sanity check for the card index and warn/correct it if it's a value out of the range.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9caf6b5908e1e3b10478e9201ca1be809145253f < 41a952304cc8a308748e3f58462c879f2a9c4340affected
LinuxLinux9caf6b5908e1e3b10478e9201ca1be809145253f < cc0f757d017f4271f137c77e130314bb23792347affected
LinuxLinux9caf6b5908e1e3b10478e9201ca1be809145253f < 1cb30691dc893aafcbc1e211e94764014c0f5d12affected
LinuxLinux9caf6b5908e1e3b10478e9201ca1be809145253f < 487ede9b648fc0eb15866f408c41aac2c57f85d5affected
LinuxLinux9caf6b5908e1e3b10478e9201ca1be809145253f < fbf3fb097e66fc1874e54ecc46d600d9325480d6affected
LinuxLinux9caf6b5908e1e3b10478e9201ca1be809145253f < 7555e83d7738e65dc83921e3c85bbdc081f08f2faffected
LinuxLinux9caf6b5908e1e3b10478e9201ca1be809145253f < 6d6fdb24fe2eaf6174fc502284c6e1dc5f7242baaffected
LinuxLinux9caf6b5908e1e3b10478e9201ca1be809145253f < e0fb960b227fcdebe22e4f26c9486d60943c0424affected
LinuxLinux2.6.16affected
LinuxLinux0 < 2.6.16unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References