CVE-2026-89503
Description
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix subbuf resize race with ring_buffer_alloc_read_page() ring_buffer_alloc_read_page() is racy with ring_buffer_subbuf_order_set, it can allocate a reader page with an outdated order. This isn't a big issue, the user can still re-allocate a new reader page and try again. However, what is more problematic is if the value of subbuf_order changes in the middle of ring_buffer_alloc_read_page(). In that case, bpage->order might not match the actual allocated memory. Use bpage->order for the allocation to prevent this race.
How to fix
- Linux Linux2313ff69bd237aad264a5913907f374f958335a2, 2dc510957fe8fd098ab3c3147ebdf34d00cd2734, 53106e9262a310ef2c9a9321168c03705940c678, e743527c5bfdceda1095bc0a9e596e2aebb6a9c3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | bce761d757452ba5eb77e11fecc37a04b67494e7 ≤ v < 2313ff69bd237aad264a5913907f374f958335a2, bce761d757452ba5eb77e11fecc37a04b67494e7 ≤ v < 2dc510957fe8fd098ab3c3147ebdf34d00cd2734, bce761d757452ba5eb77e11fecc37a04b67494e7 ≤ v < 53106e9262a310ef2c9a9321168c03705940c678, bce761d757452ba5eb77e11fecc37a04b67494e7 ≤ v < e743527c5bfdceda1095bc0a9e596e2aebb6a9c3, 6.8 | 2313ff69bd237aad264a5913907f374f958335a2, 2dc510957fe8fd098ab3c3147ebdf34d00cd2734, 53106e9262a310ef2c9a9321168c03705940c678, e743527c5bfdceda1095bc0a9e596e2aebb6a9c3 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.