Description (CNA)
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ring_buffer_alloc_read_page() is racy with ring_buffer_subbuf_order_set, it can allocate a reader page with an outdated order.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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected bce761d757452ba5eb77e11fecc37a04b67494e7 before 2313ff69bd237aad264a5913907f374f958335a2; affected bce761d757452ba5eb77e11fecc37a04b67494e7 before 2dc510957fe8fd098ab3c3147ebdf34d00cd2734; affected bce761d757452ba5eb77e11fecc37a04b67494e7 before 53106e9262a310ef2c9a9321168c03705940c678; affected bce761d757452ba5eb77e11fecc37a04b67494e7 before e743527c5bfdceda1095bc0a9e596e2aebb6a9c3 |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 6.12.112 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.