CVE-2026-74634
High
Description
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Prevent subbuf order change when resizing is disabled Because ring_buffer_subbuf_order_set() frees buffer pages, we can't allow it when resizing is disabled. A non-consuming reader is at risk of use-after-free (rb_advance_iter()). Return -EBUSY on resize_disabled, matching ring_buffer_resize() behaviour.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux
PublishedAug 22, 2026
First seenAug 22, 2026
How to fix
Update
- Linux Linuxb45b91db41379ee5fb36c187d6d7c37b725cbe8e, 62978cf6347972c04130e4e841ba404504d92b32, 7568e9e717e7540bd05bcc007f5d76fcaff3cdff, bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | f9b94daa542a8d2532f0930f01cd9aec2d19621b ≤ v < b45b91db41379ee5fb36c187d6d7c37b725cbe8e, f9b94daa542a8d2532f0930f01cd9aec2d19621b ≤ v < 62978cf6347972c04130e4e841ba404504d92b32, f9b94daa542a8d2532f0930f01cd9aec2d19621b ≤ v < 7568e9e717e7540bd05bcc007f5d76fcaff3cdff, f9b94daa542a8d2532f0930f01cd9aec2d19621b ≤ v < bf98d7b0d5a99991e47e66cee4eb1d3fa514be97, 6.8 | b45b91db41379ee5fb36c187d6d7c37b725cbe8e, 62978cf6347972c04130e4e841ba404504d92b32, 7568e9e717e7540bd05bcc007f5d76fcaff3cdff, bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 |
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