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
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fbf3fb097e66fc1874e54ecc46d600d9325480d6affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7555e83d7738e65dc83921e3c85bbdc081f08f2faffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6d6fdb24fe2eaf6174fc502284c6e1dc5f7242baaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e0fb960b227fcdebe22e4f26c9486d60943c0424affected
LinuxLinux0 < 6.12.109affected
LinuxLinux0 < 6.18.50affected
LinuxLinux0 < 7.2.4affected
LinuxLinux6.12.109 <= 6.12.*unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References