CVE-2026-74634
ring-buffer: Prevent subbuf order change when resizing is disabled
CVSS Score
7.8
EPSS Score
0.2%
EPSS Percentile
6th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 22, 2026 |
| Last Updated | Aug 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new high vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
f9b94daa542a8d2532f0930f01cd9aec2d19621b < b45b91db41379ee5fb36c187d6d7c37b725cbe8e f9b94daa542a8d2532f0930f01cd9aec2d19621b < 62978cf6347972c04130e4e841ba404504d92b32 f9b94daa542a8d2532f0930f01cd9aec2d19621b < 7568e9e717e7540bd05bcc007f5d76fcaff3cdff f9b94daa542a8d2532f0930f01cd9aec2d19621b < bf98d7b0d5a99991e47e66cee4eb1d3fa514be97
Linux / Linux
6.8
References
git.kernel.org: https://git.kernel.org/stable/c/b45b91db41379ee5fb36c187d6d7c37b725cbe8e git.kernel.org: https://git.kernel.org/stable/c/62978cf6347972c04130e4e841ba404504d92b32 git.kernel.org: https://git.kernel.org/stable/c/7568e9e717e7540bd05bcc007f5d76fcaff3cdff git.kernel.org: https://git.kernel.org/stable/c/bf98d7b0d5a99991e47e66cee4eb1d3fa514be97