Description
In the Linux kernel, the following vulnerability has been resolved: nfsd: fix possible badness in FREE_STATEID When multiple FREE_STATEIDs are sent for the same delegation stateid, it can lead to a possible either use-after-free or counter refcount underflow errors. In nfsd4_free_stateid() under the client lock we find a delegation stateid, however the code drops the lock before calling nfs4_put_stid(), 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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
3f29cc82a84c23cfd12b903029dd26002ca825f5 to < 7ca9e472ce5c67daa3188a348ece8c02a0765039affected3f29cc82a84c23cfd12b903029dd26002ca825f5 to < c88c150a467fcb670a1608e2272beeee3e86df6eaffected172d038b7c4d3cfa9fc5ac210577c5c4f8256320affected6.6.160 to < 6.7affected
Linux Linux
Default version status: affected
6.9affected0 to < 6.9unaffected6.11.4 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected