In the Linux kernel, the following vulnerability has been resolved: nfsd: fix possible badness in FREESTATEID When multiple FREESTATEIDs are sent for the same delegation stateid, it can lead to a possible either use-after-free or counter refcount underflow errors. In nfsd4freestateid() under the client lock we find a delegation stateid, however the code drops the lock before calling nfs4putstid(), that allows another FREE_STATE to find the stateid again. The first one will proceed to then free the stateid which leads to either use-after-free or decrementing already zeroed counter.
{ "availability": "No subscription required", "binaries": [ { "binary_version": "6.11.0-1015.15", "binary_name": "linux-buildinfo-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-headers-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-image-unsigned-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-image-unsigned-6.11.0-1015-oem-dbgsym" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-modules-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-modules-ipu6-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-modules-ipu7-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-modules-iwlwifi-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-modules-usbio-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-modules-vision-6.11.0-1015-oem" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-oem-6.11-headers-6.11.0-1015" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-oem-6.11-tools-6.11.0-1015" }, { "binary_version": "6.11.0-1015.15", "binary_name": "linux-tools-6.11.0-1015-oem" } ] }