CVE-2021-47060

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: KVM: Stop looking for coalesced MMIO zones if the bus is destroyed Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev() fails to allocate memory for the new instance of the bus. If it can't instantiate a new bus, unregister_dev() destroys all devices _except_ the target device. But, it doesn't tell the caller that it obliterated the bus and invoked the destructor for all devices that were on the bus. In the coalesced MMIO case, this can result in a deleted list entry dereference due to attempting to continu...

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 41b2ea7a6a11e2b1a7f2c29e1675a709a6b2b98d < 7d1bc32d6477ff96a32695ea4be8144e4513ab2d, >= f65886606c2d3b562716de030706dfe1bea4ed5e < 2a20592baff59c5351c5200ec667e1a2aa22af85, >= f65886606c2d3b562716de030706dfe1bea4ed5e < 168e82f640ed1891a700bdb43e37da354b2ab63c, >= f65886606c2d3b562716de030706dfe1bea4ed5e < 50cbad42bfea8c052b7ca590bd4126cdc898713c, >= f65886606c2d3b562716de030706dfe1bea4ed5e < 5d3c4c79384af06e3c8e25b7770b6247496b4417, >= f0dfffce3f4ffd5f822568a4a6fb34c010e939d1, >= 840e124f89a5127e7eb97ebf377f4b8ca745c070, >= 40a023f681befd9b2862a3c16fb306a38b359ae5, >= 19184bd06f488af62924ff1747614a8cb284ad63, >= 68c125324b5e1d1d22805653735442923d896a1d, >= 5.4.66 < 5.4.119, >= 4.4.238 < 4.5, >= 4.9.238 < 4.10, >= 4.14.200 < 4.15, >= 4.19.148 < 4.20, >= 5.8.10 < 5.9, >= 5.9, >= 5.9 < 5.10.37, >= 5.11 < 5.11.21, >= 5.12 < 5.12.4

Fixed versions

5.4.119, 5.10.37, 5.11.21, 5.12.4

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

Not available