CVE-2024-50043 - Linux Kernel - NFSd Use-After-Free/Refcount Underflow Vulnerability

CVE ID : CVE-2024-50043
Published : Oct. 21, 2024, 8:15 p.m. | 24 minutes ago
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.
Severity: 0.0 | NA
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