cve-2024-50043
Vulnerability from cvelistv5
Published
2024-10-21 19:39
Modified
2024-12-19 09:31
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6ePatch
Impacted products
Vendor Product Version
Linux Linux Version: 3f29cc82a84c23cfd12b903029dd26002ca825f5
Version: 3f29cc82a84c23cfd12b903029dd26002ca825f5
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   Linux Linux Version: 6.9
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