CVE-2026-97617ring-buffer: Check resize_disabled before publishing the new subbuf order
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: Check resize_disabled before publishing the new subbuf order ring_buffer_subbuf_order_set() stores the new order and only then walks the CPUs, returning -EBUSY if any of them has resizing disabled. A user mapped buffer has resizing disabled, and __rb_map_vma() reads buffer->subbuf_order without buffer->mutex, so an mmap of an already mapped CPU racing the failing order change sizes the mapping with the new order and inserts pages past the sub-buffer into the VMA. Check the CPUs before storing the new order.
- CVSS
- Not yet scored
- 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
- Sep 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 117c39200d9d760cbd5944bb89efb7b9c51965aa before f2099644e1b2a2c0805c5240d63ab0522d9d0174; 117c39200d9d760cbd5944bb89efb7b9c51965aa builds before 9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06; 117c39200d9d760cbd5944bb89efb7b9c51965aa builds before 32bf47db9237c5b8b6f6aaa5356bb4c79d241f76; from 117c39200d9d760cbd5944bb89efb7b9c51965aa before d860c67c051685abb0460b593b193f0f45f4fa92 | CNA record |
References
- https://git.kernel.org/stable/c/f2099644e1b2a2c0805c5240d63ab0522d9d0174
- https://git.kernel.org/stable/c/9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06
- https://git.kernel.org/stable/c/32bf47db9237c5b8b6f6aaa5356bb4c79d241f76
- https://git.kernel.org/stable/c/d860c67c051685abb0460b593b193f0f45f4fa92
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.