Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: most: usb: fix double free on late probe failure The MOST subsystem has a non-standard registration function which frees the interface on registration failures and on deregistration. This unsurprisingly leads to bugs in the MOST drivers, and a couple of recent changes turned a reference underflow and use-after-free in the USB driver into several double free and a use-after-free on late probe failures.

Affected versions

Linux: 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c through before 90e6ce2b1b19fb8b9d4afee69f40e4c6a4791154 (git); 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c through before a4c4118c2af284835b16431bbfe77e0130c06fef (git); 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c through before 0dece48660be16918ecf2dbdc7193e8be03e1693 (git); 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c through before 993bfdc3842893c394de13c8200c338ebb979589 (git); 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c through before 2274767dc02b756b25e3db1e31c0ed47c2a78442 (git); 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c through before 8d8ffefe3d5d8b7b73efb866db61130107299c5c (git); 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c through before baadf2a5c26e802a46573eaad331b427b49aaa36 (git); 5.6 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.