BELL-CVE-2025-21777

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CVE-2025-21777

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Validate the persistent meta data subbuf array The meta data for a mapped ring buffer contains an array of indexes of all the subbuffers. The first entry is the reader page, and the rest of the entries lay out the...

CVE-2025-21777

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Validate the persistent meta data subbuf array The meta data for a mapped ring buffer contains an array of indexes of all the subbuffers. The first entry is the reader page, and the rest of the entries lay out the...

CVE-2025-21777 ring-buffer: Validate the persistent meta data subbuf array

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Validate the persistent meta data subbuf array The meta data for a mapped ring buffer contains an array of indexes of all the subbuffers. The first entry is the reader page, and the rest of the entries lay out the...

CVE-2025-21777

CVE-2025-21777 affects the Linux kernel ring-buffer metadata validation. The vulnerability stems from the subbuf index array (reader page and subbuffer order) potentially containing duplicates, which the validator did not check. If duplicates exist on the writer side, the ring buffer link list co...