CVE-2026-74634ring-buffer: Prevent subbuf order change when resizing is disabled
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f9b94daa542a8d2532f0930f01cd9aec2d19621b before b45b91db41379ee5fb36c187d6d7c37b725cbe8e; from f9b94daa542a8d2532f0930f01cd9aec2d19621b before 62978cf6347972c04130e4e841ba404504d92b32; from f9b94daa542a8d2532f0930f01cd9aec2d19621b before 7568e9e717e7540bd05bcc007f5d76fcaff3cdff; from f9b94daa542a8d2532f0930f01cd9aec2d19621b before bf98d7b0d5a99991e47e66cee4eb1d3fa514be97 | CNA record |
References
- https://git.kernel.org/stable/c/b45b91db41379ee5fb36c187d6d7c37b725cbe8e
- https://git.kernel.org/stable/c/62978cf6347972c04130e4e841ba404504d92b32
- https://git.kernel.org/stable/c/7568e9e717e7540bd05bcc007f5d76fcaff3cdff
- https://git.kernel.org/stable/c/bf98d7b0d5a99991e47e66cee4eb1d3fa514be97
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.